ii. 235, 236

_Arctonyx_, ii. 199

_Arctopithecus_, ii. 244

_Arctotherium_ in Brazilian caves, i. 144 S. American Pliocene, i. 146

_Ardea_, ii. 359

ARDEIDÆ, ii. 359

_Ardistomus_, ii. 490

_Argentina_, ii. 488

_Arges_, ii. 444

ARGONAUTIDÆ. ii. 505

_Argus pheasant_, figure of, i. 339 peculiarity in display of plumage, and confirmation of Mr. Darwin's views, i. 340

_Argusianus_, ii. 340

_Argutor_, ii. 489

_Argynnis_, ii. 474

_Aricoris_, ii. 476

_Ariella_, ii. 195

_Arinia_, ii. 520

_Arion_, ii. 517

_Aristobia_, ii. 501

_Arius_, ii. 443

Armadillos, ii. 245

_Arnoglossus_, ii. 441

_Aromochelys_, ii. 408

_Arremon_, ii. 99

_Arrhenotus_, ii. 501

_Artamia_, ii. 268