GENERAL INDEX. 



591 



Odontochila, ii. 4S6 



Odontolabris, ii. 493 



Odontophorvs, ii. 339 



Odontophrynus, ii. 420 



(Edemia, ii. 364 



(Edicnemis, ii. 355 



Oedura, ii. 399 



(Eim, ii. 332 



Ogmodon, ii. 383 



Ogyris, ii. 477 



Oligdon, ii. 375 



OLIGODONTIDiE, ii. 374 



Oligosarcus, ii. 445 



OUsthopus, ii. 489 



Olylogon, ii. 418 



Olyra, ii. 442 



Omoseus, ii. 489 



Ovimatophoca, ii. 204 



Omolepida, ii. 397 



Oniostcnrts, ii. 492 



Omphalotropis, ii. 521 



0?n«s, ii. 487 



ONCIDIAD^, ii. 517 



Oncidium, ii. 518 , 



Onychodactylus, ii. 413 



Onychogale, ii. 195 



Onychogalea, ii. 25i 



Onychognathus, ii. 288 



Onchorhynchus, ii. 447 



Omcostoma, ii. 101 



Ophidia, classification of, i. 99 



OPHIDIA, ii, 372 



remarks on the general distribution of, li. 



386 

 fossil, ii. 387 

 OPHIDIID^, ii. 440 

 Ophidium, ii 440 

 OPHIOCEPHALIDiE, ii 435 

 Ophiodes, ii. 397 

 OPHIOMORIDiE, ii. 398 

 Ophiomorxis, ii. 398 

 Ophiophagtis, ii. 383 

 Ophiops, ii 391 

 Ophioscin(nis, ii. 397 

 Ophismirvs, ii. 392 

 Ophites, ii. 380 

 Ophonus, ii. 489 

 Ophryodera, ii. 487 

 Ophysia, ii. 209 



OPISTHO-BRANCHIATA, ii. 529 

 OPISTHOCOMI, ii. 345 

 Opisthocomtis, Brazilian caves, i. 164 



ii. 345 

 Opisthodelphys, ii. 418 

 Opisthostoma, ii. 620 

 Opisthoporus, ii. 520 

 Oporornis, ii. 279 



Opossum, extinct in European Miocene, 1. 121 

 Opossums, ii. 248 

 Opsariichthys, ii. 452 

 Opsiphanes, ii. 472 

 Orang-utan* ii. 171 

 Orca, ii. 209 

 Orcadla, ii. 209 

 Orchesticus, ii. 99 

 Orchilus, ii. 101 

 Oreas, ii. 223 

 Oreicola, ii. 260 

 Oreinus, ii. 452 

 Oreocephalus, ii. 401 

 Oreocincla, ii. 256 

 Oreodeira, ii. 401 



Oreodon, N. American Tertiary, i. ]."S 

 Oreodontid<e, N. American Tertiaiy. i. l."S 

 Orececa, ii. 271 

 Oreomanes, ii. 278 



Oreonecte, ii. 453 

 Oreonympha, ii. 108 

 Oreoperdir, ii. 338 

 OREOPHASIN.E, ii. 343 

 Oreophasis, ii. 343 

 Oreophilus, ii. 356 

 Orenpyra, ii. 107 

 Oreortyx, ii. 339 

 Oreoscopies, ii. 256 

 Oreothraupis, ii. 99 

 Oreoirochilus, ii. 107 

 Orestias, ii. 450 

 Oriental region, defined, i. 75 

 subdivisions of, i 75 

 description of, i, 314 

 zoological features of, i. 315 

 mammalia of, i. 315 

 birds of, i. 316 

 reptiles of, i. 317 

 amphibia of, i. 317 

 fresh-water fishes of, i. 318 

 summary of vertebiata of, i. SIS 

 insects of, i. 318 

 sub-regions of, i. 321 

 concluding remarks on, i. 362 

 tables of distribution of animals of, i. 364 

 Oriental relations of W. African sub-region, i. 



265 

 Oriental and Palsearctic faunas once identical, 



i. 362 

 Oriental and Ethiopian faunas, cause of their 



resemblances, i. 363 

 Orignia, ii. 260 

 Oriocalotes, ii. 402 

 Orioles, ii. 268 

 ORIOLID^, ii. 268 

 Oriohis, ii. 268 

 Orites, ii. 266 

 Omithion, ii. 101 



ORNITHORHYNCHID^, ii. 253 

 OrnitJutrhynchus, ii. 253 

 Orocmtes, ii. 256 



Orohippus, N. American Tertiary, i 136 

 Ortalida, ii. 343 

 Orthagoriscus, ii. 457 

 Orthalicns, ii. 516 

 ORTHID^, ii. 532 

 ORTHOCERATID^ ii. 506 

 Orthodon, ii 452 

 Orthogonius, ii. 491 

 Orthogonys, ii. 98 

 Orthonyx, ii. 260 

 Orthorhynchvs, ii. 108 

 Orthotomus, ii. 257 

 Ortygometra, ii. 352 

 Ortygornis, ii. 338 

 Ortyx, ii. 339 

 Ortyxelos, ii. 341 

 ORYCTEROPODID^, ii. 246 

 Orycteropus, ii. 246 

 Oryctenis, ii. 231 

 ORYGINiE, ii. 223 

 Oryx, ii. 223 

 Oryzohorus, ii. 285 

 Oryzorictes, ii. 188 

 Osmerus, ii. 447 

 Osphranter, ii. 251 

 Osteobrama, ii. 453 

 Osteochilus, ii. 451 

 Osteogeniosus, ii. 443 

 OSTEOGLOSSID.E, ii. 454 

 Ostfoglossvm, ii. 454 

 Ostinops, ii. 282 

 OSTREID^, ii. 533 

 Ostrith, Miocene of N. India, 1. 162 

 Ostriches, iL 368 



