Chapter 37

According to Jerdon this vole has only been procured in Sikim near Darjeeling, at heights varying from 7000 to 15,000 feet; but I believe the area it inhabits to be much larger. Hodgson found his specimens at Darjeeling, and on one occasion got a nest in a hollow tree in the forest; it was saucer-shaped, of soft grass without any lining, and contained a male, female, and two young. The latter were "2-1/8 inches long, hairy above, nude below, and blind; the ears also closed." Jerdon writes: "Mr. Atkinson found it under fallen trees and stones on the top of Tonglo, near Darjeeling, 10,000 feet, whence also I had a specimen brought me."

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The next species is one described and figured by Professor Milne-Edwards, and from Thibet he has two illustrations of it--one of an entire blackish-brown, the other darker above, but with the black belly.

NO. 395. ARVICOLA MELANOGASTER.

HABITAT.--Moupin in Tibet.

DESCRIPTION.--"It is characterised by the colour of the lower parts, which are a blackish-grey. The upper parts are sometimes as black as a mole, sometimes grizzled with brown" ('Mammiferes,' p. 284). The brown specimen with the dark belly is evidently a rarity.

FAMILY SPALACIDAE.

The members of this family are characterised by very large incisors; some have premolars, as in _Bathyergus_ and two other genera, but not in the _Spalacinae_, of which our bamboo-rat (_Rhizomys_) is the representative in India. "The grinding teeth are rooted, not tuberculate, but with re-entering enamel folds; infra-orbital opening moderate or small, with no perpendicular plate; occipital plane high, often sloped boldly forward; palate narrow; form cylindrical; eye and ear-conch very small, sometimes rudimentary; limbs short and stout; claws large; tail short or absent" (_Alston_, 'P. Z. S.' 1876, p. 86). There are two subfamilies--_Spalacinae_ and _Bathyerginae_.

_GENUS RHIZOMYS--THE BAMBOO-RAT_.

"Form robust; eyes very small; ears very short, naked; pollex rudimentary; tail rather short, partially haired; skull broad; occipital plane only slightly sloped forward; infra-orbital opening small, sub-triangular; upper incisors arched forward; no premolar; upper molars with one deep internal and two or more external enamel-folds; the lower molars reversed."--_Alston_.

NO. 396. RHIZOMYS BADIUS. _The Chestnut Bamboo-Rat_ (_Jerdon's No. 201_).

NATIVE NAME.--Known to the Chingpaws or Kakhyens as the _Yewcron_.--_Anderson_.

HABITAT.--The Sikim and Nepal Terai; Burmah; Arakan; Kakhyen Hills.

DESCRIPTION.--Fine fur, of a grey or slaty grey for two-thirds of the basal portion, the remaining upper third being from a deep to a bright chestnut. "Most intense on the head, and dullest on the rump" (_Anderson_). "Below dark ashy grey" (_Jerdon_). "The fur of the under-parts in these Eastern examples of the species" (referring to those from the Kakhyen hills) "is paler and more reddish than chestnut, whereas in some Nepal animals it inclines even to slaty grey, washed with reddish. The area immediately around the muzzle and the chin is pale brownish, with a tinge of greyish, and the teeth are brilliant reddish, the nose, ears, feet, and tail being pale flesh-coloured" (_Anderson_, 'Anat. and Zool. Res.' p. 329).

SIZE.--Head and body, 7 inches; tail, about 2-1/2 inches.

Jerdon says of this species that "it eats the roots of bamboos and other trees, constructing burrows under the roots. It is said to be very bold, and easily taken." "In Burmah it constructs its burrows amongst a rank and tall jungle grass, on the roots of which it is said to live" (_Anderson_). Blyth, who writes of the Burmese form, says: "it is barely separable from _R. badius_, from which it seems to differ only in its much brighter colouring."

NO. 397. RHIZOMYS ERYTHROGENYS. _The Red-cheeked Bamboo-Rat_.

HABITAT.--Burmah; the Salween hill tracts; Tenasserim.

DESCRIPTION.--Upper parts dark iron grey; almost black on the top of the head; the upper lip, chin and upper part of the throat are white, also the chest and belly, which are however more or less tinged with grey and reddish; the lower portion of the throat is dark grey; the sides of the head and cheeks are bright golden red; the feet are sparsely clad and leaden coloured, except the toes of the hind feet, which are fleshy white; tail rather thick at the base, quite naked, not scaly, and of a leaden hue; claws rather broad, and moderately strong.

SIZE (of the living female).--Head and body, 14-3/4 inches; tail, 5.35 inches.

Dr. Anderson, from whose work I have taken the above description, and who was the first to describe and name this animal, says that a female was recently received in the Zoological Gardens from Mr. A. H. Hildebrand.

NO. 398. RHIZOMYS PRUINOSUS. _The Hoary Bamboo-Rat_.

HABITAT.--Assam; very common about Cherrapoonjee; Burmah; Kakhyen hills east of Bhamo.

DESCRIPTION.--Brown above, grizzled with white; the base of the fur being slaty grey, tipped with brown, and intermixed with longer hairs, terminating in white bands; underneath much the same, only the white-tipped hairs are shorter and less numerous; whiskers dark brown; the head is generally more grey; ears, nose, feet and tail of a dusky flesh tint; tail one-third of the body.

SIZE.--Head and-body, about 11 to 13 inches; tail, 3 to 4 inches.

NO. 399. RHIZOMYS MINOR. _The Small Bamboo-Rat_.

NATIVE NAME.--_Khai_, Aracanese.

HABITAT.--Burmah, Upper Martaban, and at Yanageen on the Irrawaddy.--_Blyth_.

DESCRIPTION.--"Dark sooty brown above, slightly tinged with deep umber, which is most distinct on the sides of the head and neck, and in reflected light; the under parts are like the upper, only the brown tint is almost absent; the whiskers are black, and tail very sparsely haired" (_Anderson_). "Dusky brown colour, with white muzzle and around the eye, and pale naked feet" (_Blyth_).

SIZE.--Head and body, 6-1/2 inches; tail, 1-3/4 inch.

Blyth says he obtained a living specimen in Upper Martaban, and recognised it as the same as what had been obtained in Siam. The Rev. Mr. Mason writes of it: "This animal, which burrows under old bamboo roots, resembles a marmot more than a rat; yet it has much of the rat in its habits. I one night caught a specimen gnawing a cocoa-nut, while camping out in the jungles."

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I may here mention a curious little animal, which is apparently a link between the MURIDAE and the SPALACIDAE, _Myospalax fuscocapillus_, named and described by Blyth ('J. A. S. B.' xv. p. 141), found at Quetta, where it is called the "Quetta mole." A full account of it by Mr. W. T. Blanford is to be found in the 'Journal Asiatic Society of Bengal,' (vol. L. pt. ii.).

FAMILY DIPODIDAE.

This family contains a form of rodent similar to, yet more pronounced than, the jerboa rats, of which I have already treated. It includes the true Jerboas (_Dipus_), the American Jumping Mice (_Zapus_), the _Alactaga_, and the Cape Jumping Hare (_Pedetes caffer_). The characteristics of the family are as follows:--

"Incisors compressed; premolars present or absent; grinding teeth rooted or rootless, not tuberculate, with more or fewer transverse enamel folds; skull with the brain-case short and broad; infra-orbital opening rounded, very large (often as large as the orbit); zygomatic arch slender, curved downwards; the malar ascending in front to the lachrymal in a flattened perpendicular plate; facial surface of maxillaries minutely perforated; mastoid portion of auditory bullae usually greatly developed; metatarsal bones elongated, often fused into a cannon bone; form gracile; front portion of body and fore-limbs very small; hind limbs long and strong, with from three to five digits; tail long, hairy. Three sub-families" (_Alston_ On the Order GLIRES, 'P. Z. S.' 1876). The three sub-families are _Zapodidae_,[28] _Dipodinae_ and _Pedetinae_, but we have only to deal with the second.

[Footnote 28: Formerly _Jaculinae_.]

_GENUS DIPUS--THE JERBOAS_.

Hind feet with three digits; tail cylindrical and tufted; incisors grooved; premolars absent, or, if found, then in the upper jaw and rudimentary; skull with very broad occipital region; greatly developed auditory bullae; the cervical vertebrae are more or less anchylosed, and the metatarsals are united. They are not found in the plains of India, though one species inhabits Yarkand, and two more are found in Eastern Persia.

NO. 400. DIPUS LAGOPUS. _The Yarkand Jerboa_.

HABITAT.--Koshtak, south of Yarkand; Yarkand; and Yangihissar.--_Blanford_.

DESCRIPTION.--"Colour above light sandy brown, slightly washed with dusky, below pure white; a white band across the outside of the thigh; tail pale brown above, whitish below, with a tuft of longer hair, altogether about 2-1/2 inches long; at the end the terminal portion pure white, the proximal portion black or dark-brown on the upper part and sides, but brown or white beneath the tail. The fur is very soft and rather long, 0.6 to 0.8 inch in the middle of the back; on the upper parts it is ashy grey at the base and for the greater parts of its length, pale sandy brown near the end; the extreme tip dusky brown; on the lower parts it is white throughout; ears about half the length of the head, oval, naked inside, thinly clothed with short brown hair outside; face sandy; the hairs grey at the base; sides of head whitish; whiskers as usual very long, exceeding three inches; the uppermost brown; the longest white, except at the base; the lower entirely white; the long hairs beneath the hind feet all white, as are the feet throughout."--_Blanford_, 'Sc. Res. of Sec. Yarkand Mission,' pp. 58,59.

_GENUS ALACTAGA_.

"Hind feet with _five_ digits, of which the first and fifth do not reach the ground; tail cylindrical, tufted; skull with the occipital region less broad, and the auditory bullae smaller; infra-orbital opening with no separate canal for the nerve; incisors plain. One very small premolar present above only."--_Alston_.

NO. 401. ALACTAGA INDICA.

NATIVE NAME.--_Khanee_, Afghan.

HABITAT.--Afghanistan; Eastern Persia.

DESCRIPTION.--Fawn colour above; the hair with black tips and ashy grey at the base; under-parts white; upper parts of thigh white; a black spot behind and inside the thigh just below the white; remainder of the outside and lower part of the inside of the thighs brown; a white line running down the front, and extending over the upper portion of the tarsi and feet; proximal portion of tarsus brown at the sides. (_See_ 'Blanford's Eastern Persia,' vol. ii. p. 77.) The tail is brown with a white tip; ears thinly clad with brown hairs; head brown above, whitish around the eyes; whiskers black.

SIZE.--Head and body, 3-1/2 inches; tail, 7 inches.

This animal is unfortunately named, as it is not Indian at all; equally unfortunate, as Mr. Blanford has shown, is Blyth's name _Bactrianus_, for it does not inhabit that tract, so the original title stands. Hutton, in his 'Rough Notes on the Zoology of Candahar' ('J. A. S. B.' xv. p. 137), writes of it as follows: "This beautiful little animal is abundant over all the stony plains throughout the country, burrowing deeply, and when unearthed bounding away with most surprising agility after the manner of the kangaroo-rat. It is easily tamed, and lives happily enough in confinement if furnished with plenty of room to leap about. It sleeps all day, and so soundly that it may be taken from its cage and examined without awaking it; or at most it will half open one eye in a drowsy manner for an instant, and immediately close it again in sleep. It retires to its burrows about the end of October, and remains dormant till the following April, when it throws off its lethargy and again comes forth." There is a good engraving of this animal in Cassel's new Natural History.

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We have now closed our account of the Myomorpha or Mouse-like Rodents, and will proceed to the next Section, HYSTRICOMORPHA, or Porcupine-like Rodents.

SECTION III.--HYSTRICOMORPHA. PORCUPINE-LIKE RODENTS.

This section contains six families, viz.:--

_Octodontidae_ = 3 sub-families, 18 genera. _Hystricidae_ = 2 sub-families, 5 genera. _Chinchillidae_ = 5 genera, of which two are fossil. _Dasyproctidae_ = 2 genera. _Dionymidae_ = 1 genus. _Caviidae_ = 3 genera.

Of these we have to deal with but one, the second family, _Hystricidae_, the rest belonging to Africa in part, but the majority to the American continent, chiefly South America.

I give the general characteristics of the section as laid down by Mr. Alston:--

"One premolar above and below (except in _Ctenodactylus_); grinding teeth rooted or rootless, not tuberculate; frontals with no distinct post-orbital processes (except in _Chaetomys_); infra-orbital opening large, sub-triangular, or oval; zygomatic arch proportionately stout; molar not advancing far forward, (except in _Ctenodactylinae_ and _Chinchillidae_) and not supported below by a continuation of the maxillary zygomatic process; incisive foramina small; foramina in the base of skull proportionally large; an inter-pterygoid fissure; mandible with its angular portion springing from the _outer side_ of the bony covering of the lower incisor, triangular, usually pointed behind; coronoid process small, and condyle low; clavicles perfect or imperfect; fibula persistent as a distinct bone throughout life; upper lip rarely cleft; muffle clad with fine hairs; nostrils pointed above, sigmoid or linear; ears usually emarginate behind; tail hairy, sub-naked, or scaly."--'P. Z. S.,' 1876, p. 90.

As I have said before, we have only to do with the _Hystricidae_ or Porcupines, but many of the others are familiar by name. Of the _Octodontidae_ the best known is the coypu of the Andes, one of the largest of the rodents, and the ground-rat or ground-pig of western and southern Africa. The chinchilla, which is the typical form of the third family, is known to all, especially ladies, from its delicate soft fur. The agouti of South America is the representative of the _Dasyproctidae_. The family _Dinomyidae_ consists of one animal only, _Dinomys Branickii_; the only known example of which was obtained in Peru on the Montana de Vitoc. It was found walking about in a yard at daybreak, and showed so little fear of man that it suffered itself to be killed by the stroke of a sword. It is a pity no one was sensible enough to try and take it alive. As yet nothing is known of its habits. Of the last family, _Caviidae_, the cavy and the capybara are well known to travellers in South America, and the common guinea pig is familiar to us all.

FAMILY HYSTRICIDAE--THE PORCUPINES.

In this family the hairs of the body are more or less converted into spines or quills; the form of the skull is peculiar, being ovate, often greatly inflated with air cavities in the bones; the facial portion is broad and short; the malar portion of the zygomatic arch has no inferior angular process as in the _Octodontidae_; the occipital plane or hinder-surface is perpendicular, with a median ridge; the incisor teeth are large and powerful; the molars with external and internal folds, four in each jaw. The form is robust; limbs sub-equal; fore-feet with four toes, and a small wart-like thumb; hind-feet with four and five toes; tail long in some, short in others. There are two sub-families--_Sphingurinae_ and _Hystricinae_. With the genera of the first we have nothing to do. They include the prehensile-tailed porcupines of South America, _Sphingurus prehensilis_, _S. villosus_, and _S. Mexicanus_, all arboreal forms, and the Canada porcupine (_Erythizon dorsatus_) which is covered with woolly hairs and spines intermixed. The true porcupines, sub-family _Hystricinae_, consist of two genera, both of which are represented in India--_Atherura_ and _Hystrix_.

SUB-FAMILY HYSTRICINAE--THE TRUE PORCUPINES.

Grinding teeth semi-rooted; skull rather more elongate; infra-orbital foramen of great size; clavicles imperfect, attached to the sternum, and not to the scapula; upper lip furrowed; tail not prehensile; soles of feet smooth. The female has six mammae. In these points they differ from the American arboreal porcupines (_Sphingurus_), the skull of which is very short, the tail prehensile, the soles of the feet tuberculated, and the female has only four mammae.

The two genera, _Atherura_ and _Hystrix_, which compose this sub-family, are distinguished by long tail and flattened spines (_Atherura_); and short tail and round spines (_Hystrix_).

_GENUS ATHERURA--THE LONG-TAILED PORCUPINE_.

Nasal part of skull moderate; upper molars with one internal and three or four external folds, the latter soon separated as enamel loops; the lower teeth similar but reversed; the spines are flattened and channelled; the tail long and scaly, with a tuft of bristles at the end.

NO. 402. ATHERURA FASCICULATA. _The Brush-tailed Porcupine_.

HABITAT.--Assam, Khasia hills, Tipperah hills, Burmah, Siam, and the Malayan peninsula.

DESCRIPTION.--"The general tint of the animal is yellowish-brown, freckled with dusky brown, especially on the back; the spines, taken separately, are brown white at the root, and become gradually darker to the point; the points of the spines on the back are very dark, being of a blackish-brown colour. The long and stout bristles, which are mixed with the spines on the back, are similarly coloured" (_Waterhouse_, 'Mammalia,' vol. ii. p. 472). The spines are flat on the under-surface and concave on the upper, sharply pointed and broadest near the root. Mixed with the spines on the back are long bristles, very stout, projecting some three inches beyond the spines, which are only about an inch in length; below these is a scanty undergrowth of pale coloured hairs; the tail is somewhat less than half the length of the head and body, scaly, and at the end furnished with a large tuft of flattened bristles from three to four inches long, of a dirty white colour, with sometimes dusky tips; the ears are semi-ovate; whiskers long and stout, and of a brown colour; muzzle hairy; feet short, five toes, but the thumb very small, with a short rounded nail.

SIZE.--Head and body, 18 inches; tail, exclusive of tuft, 7-1/2 inches.

Specimens of this animal were sent home to the Zoological Gardens, from Cherrapoonjee in the Khasia hills, by Dr. Jerdon. This species is almost the same as the African form (_A. Africana_). They are about the same in size and form and in general appearance. This last is found in such plenty, according to Bennett, in the Island of Fernando Po as to afford a staple article of food to the inhabitants. Blyth was of opinion that the Indian animal is much paler and more freckled than the African.

_GENUS HYSTRIX--THE PORCUPINE_.

"Spines cylindrical; tail short, covered with spines and slender-stalked open quills; nasal cavity usually very large; air sinuses of frontals greatly developed; teeth as in _Atherura_. The hind-feet with five toes; claws very stout."

The hinder part of the body is covered by a great number of sharp spines, ringed black and white, mostly tipped with white; the spines are hollow or filled with a spongy tissue, but extremely tough and resistant, with points as sharp as a needle. The animal is able to erect these by a contraction of the skin, but the old idea that they could be projected or shot out at an assailant is erroneous. They easily drop out, which may have given an idea of discharge. The porcupine attacks by backing up against an opponent or thrusting at him by a sidelong motion. I kept one some years ago, and had ample opportunity of studying his mode of defence. When a dog or any other foe comes to close quarters, the porcupine wheels round and rapidly charges back. They also have a side-way jerk which is effective.

NO. 403. HYSTRIX LEUCURA. _The White-tailed Indian Porcupine_ (_Jerdon's No. 204_).

NATIVE NAMES.--_Kanta-sahi_, _Sayi_, _Sayal_, _Sarsel_, Hindi; _Sajru_, Bengali; _Chotia-dumsee_, Nepali; _Saori_, Gujrati; _Salendra_ and _Sayal_, Mahrathi; _Yed_, Canarese; _Ho-igu_, Gondi; _Phyoo_, Burmese; _Heetava_, Singhalese.

HABITAT.--All over India (except perhaps Lower Bengal), Burmah and Ceylon.

DESCRIPTION.--Blackish-brown; muzzle clad with short, stiff, bristly hairs; whiskers long and black, and a few white spines on the face; spines on the throat short, grooved, some with white setaceous points forming a half-collar; crest of head and neck formed of long black bristles, with here and there one with a long white tip; the spines of the sides are short, flattish, grooved or striated, mostly with white points; the large quills of the back are either entirely black or ringed at the base and middle with white, a few with white tips; the longer and thinner quills on the back and sides have long white terminations; many of these again, particularly the longest, have a basal and one or two central white rings; the short quills on the mesial line of the lumbar region are nearly all white, and the longer striated quills of this region are mostly white; quills of the tail white or yellowish, a few black ones at the root; pedunculated quills are long, broad, and much flattened in old animals.

SIZE.--Head and body, 32 inches; tail, 8 inches.

The description given in his 'Prodromus Faunae Zeylanicae' by Dr. Kellaart, who was a most careful observer, has been of great assistance to me in the above, as it was also, I fancy, to Jerdon, and his subsequent remarks are worthy of consideration. "The identification of species from single characters," he observes, "is at all times difficult and unsatisfactory in the genus _Hystrix_, particularly so as regard the conformation of the skull." And again: "The number of molars varies also in different specimens. In two adults obtained at Trincomalee there were only three molars on each side of the jaw, four being the dental formula of the genus _Hystrix_."

I think such aberrations ought to warn us from trying to make too many genera out of these animals. Dr. Gray, whose particular forte--or shall I say weakness?--was minute subdivision, classed (in 1847) the Indian porcupines in three sub-families, _Hystrix_, _Acanthion_, and _Atherura_; and _Acanthion_ he some years after (1866, _see_ 'P. Z. S.' p. 308) divided again into three groups, _OEdocephalus_, _Acanthochaerus_ and _Acanthion_. The difference in the skull of _Hystrix_ and _Acanthion_ lies in the intermaxillaries and the grinders, as follows:--

_Hystrix_--Inter-max. broad, truncated, wide behind as before; _grinders_ oblong, longer than broad, one fold on the inner, and three or four on the outer side.

_Acanthion_--Inter-max. triangular, tapering behind; _grinders_ sub-cylindrical, not longer than broad, one fold on the inner, two or three on the outer side.