ii. 420
_Raniceps_, ii. 439
RANIDÆ, ii. 420
_Ranodon_, ii. 413
_Rappia_, ii. 419
_Rasbora_, ii. 452
_Rasborichthys_, ii. 453
Rattle-snakes, ii. 384
Rays, ii. 462
_Realia_, ii. 521
_Rectes_, ii. 272
_Recurvirostra_, ii. 353
_Regalecus_, ii. 432
Region, the best term for the primary zoological divisions, i. 68 Arctic, why not adopted, i. 69 Palæarctic, defined, i. 71 Palæarctic, subdivisions of, i. 71 Ethiopian, defined, i. 73 Ethiopian, subdivisions of, i. 73 Oriental, defined, i. 75 Oriental, subdivisions of, i. 75 Australian, defined, i. 77 Australian, subdivisions of, i. 77 Neotropical, defined, i. 78 Neotropical, subdivisions of, i. 78 Nearctic, defined, i. 79 Nearctic, distinct from Palæarctic, i. 79 Nearctic, subdivisions of, i. 80
Regions, zoological, i. 50 zoological, how they should be formed, i. 53 zoological, may be defined by negative or positive characters, i. 54 zoological, by what class of animals best determined, i. 56 for each class of animals, not advisable, i. 58 zoological, proposed since 1857, i. 58 zoological, Mr. Sclater's, i. 59 zoological, discussion of those proposed by various authors, i. 61 zoological, proportionate richness of, i. 64 temperate and tropical, well marked in northern hemisphere, i. 65 and zones, table of, i. 66 comparative richness of, i. 81 and sub-regions, table of, i. 81 order of succession of the, i. 173
_Registoma_, ii. 521
_Reguloides_, ii. 258
_Regulus_, ii. 258
_Reinwardtænas_, ii. 333
_Reinwardtipicus_, ii. 303
_Reithrodon_, ii. 230
Representative species, i. 4
Reptiles, means of dispersal of, i. 28 classification of, i. 98 Miocene of Greece, i. 116 of Indian Miocene deposits, i. 123 extinct Tertiary, i. 165 cosmopolitan groups of, i. 176 peculiar to Palæarctic region, i. 186 of Central Europe, i. 195 of the Mediterranean sub-region, i. 204 of the Siberian sub-region, i. 220 of the Manchurian sub-region, i. 227 table of Palæarctic families of, i. 236 of the Ethiopian region, i. 254 of the E. African sub-region, i. 260 of W. Africa, i. 264 S. African, i. 268 of Madagascar, i. 279 table of Ethiopian families of, i. 297 of the Oriental region, i. 317 of the Indian sub-region, i. 326 of Ceylon, i. 327 of the Indo-Chinese sub-region, i. 331 of the Indo-Malay sub-region, i. 340 table of Oriental families of, i. 368 of the Australian region, i. 396 of New Guinea, i. 415 of the Moluccas, i. 420 of the Polynesian sub-region, i. 447 of New Zealand, i. 456 table of Australian families of, i. 472 Neotropical, ii. 9 of S. Temperate America, ii. 40 of the Mexican sub-region, ii. 54 of the Antilles, ii. 72 table of Neotropical families of, ii. 88 of the Nearctic region, ii. 119 of California, ii. 128 of Central N. America, ii. 131 of Eastern United States, ii. 133 of Canada, ii. 137 table of Nearctic families of, ii. 142 summary and conclusion, ii. 547
REPTILIA, ii. 372
_Retropinna_, ii. 447
Revillagigedo Islands, zoology of, ii. 60
_Rhabdornis_, ii. 265
_Rhabdosoma_, ii. 374
RACHIODONTIDÆ, ii. 377
_Rhacophorus_, ii. 419
_Rhamnophis_, ii. 376
RHAMPHASTIDÆ, ii. 306
_Rhamphastos_, ii. 307
_Rhamphichthys_, ii. 455
_Rhamphocænus_, ii. 104
_Rhamphococcyx_, ii. 309
_Rhamphocinclus_, ii. 256
_Rhamphocoelus_, ii. 98
_Rhamphomicron_, ii. 108
_Rhaphaulus_, ii. 520
_Rhea_, in Brazilian caves, i. 164