GENERAL INDEX. 



591 



Odontochila, ii- 4S6 

 Odontolabris, ii. 4ii3 

 Odontophor'us, ii. 339 

 Odontophrynus, ii. 420 

 (Edemia, ii. 364 

 Qidicnemis, ii. 355 

 O'edura, ii. 399 

 CEiut, ii. 332 

 Ogmodon, ii. 383 

 Ogyris, ii. 477 

 OUgdon, ii. 375 

 OLIGODONTID.E, ii. 374 

 OUgosarciiS, ii. 445 

 Olisthoinis, ii. 489 

 Olylogon, ii. 418 

 Olyra, ii. 442 

 Omwsei/s, ii. 489 

 Ommatophoca, ii. 204 

 Omolepida, ii. 397 

 Omosttnus, ii. 492 

 Omphalotropis, ii. 521 

 Om«s, ii. 487 

 ONCIDIADjE, ii. 517 

 Oncidium, ii. 518 

 Onychodactylus, ii. 413 

 Onychogcde, ii. 195 

 Onychogalea, ii. 251 

 Onychognathus, ii. 288 

 Onchorhyiiclms, ii. 447 

 OTicostoHio, ii. 101 

 Ophidia, classification of, i. 99 

 OPHIDIA, ii. 372 



remarks on the general distribution of, ii. 



380 

 fossil, ii. 387 

 OPHIDIID^, ii. 440 

 Ovhidiuni, ii 440 

 OPHIOCEPHALIDiE, ii 435 

 Ophiodes, ii. 397 

 OPHIOMORID^, ii. 398 

 Ophionwrus, ii. 398 

 Ophiophagus, ii. 383 

 Ophiops, ii 391 

 Ophioscineus, ii. 397 

 Ophisaurvs, ii. 392 

 Ophites, ii. 380 

 Ophonus, ii. 489 

 Ophryodera, ii. 487 

 Ophysia, ii. 209 



OPISTHO-BRANCHIATA, ii. 529 

 OPISTHOCOMI, ii. 345 

 OpisthocoiMis, Brazilian caves, i. 164 



ii. 345 

 Opisthodelphys, ii. 418 

 Opisthostoma, ii. 520 

 Opistlioporus, ii. 520 

 Oporornis, ii. 279 



Opossvvi, extinct in European Miocene, i. 121 

 Opossums, ii. 248 

 Opsariichthys, ii. 452 

 Opsiphanes, ii. 472 

 Orang-utan, ii. 171 

 Orca, ii. 209 

 Orcaella, ii. 209 

 Orchesticus, ii. 99 

 Orchilus, ii. 101 

 Orws, ii. 223 

 Oretcola, ii. 260 

 Oreinit^, ii. 452 

 Oreocephalus, ii. 401 

 Oreocincla, ii. 256 

 Oreodeira, ii. 401 



Oreodon, N. American Tertiary, i. l.'fS 

 Oreodontidce, N. American Tertiary i. 138 

 Oreosca, ii. 271 

 Oreomanes, ii. 278 



Oreoiiecte«, ii. 453 

 Oreonympha, ii. 108 

 Oreoperdix, ii. 338 

 OREOPHASINyE, ii. 343 

 Oreophasis, ii. 343 

 Oreophilus, ii. 356 

 Oreopyra, ii. 107 

 Oreortyx, iL 339 

 Oreoscoptes, ii. 256 

 Oreothraupis, ii. 99 

 Oreotrochihis, ii. 107 

 Orestias, ii. 450 

 Oriental region, defined, i. 75 

 subdivisions of, i 75 

 description of, i. 314 

 zoological featurts 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 verfebiata of, i. 318 

 insects of, i. 318 

 sub-regions of, i. 321 

 concluding remarks on, i. 362 

 tables of distribution of animals of, 1. 364 

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



265 

 Oriental and Patearctic faunas once identical, 



i. 362 

 Oriental and Ethiopian faunas, cause of their 



resemblances, i. 363 

 Origma, ii. 260 

 Oriocalotes, ii. 402 

 Orioles, ii. 268 

 ORIOLIU^, ii. 268 

 Orioliis, ii. 268 

 Orites, ii. 266 

 Ornithion, ii. 101 



ORNITHORHYNCHIDiE, ii. 253 

 Ornithorhynchus, ii. 253 

 OroccBtes, ii. 256 



OroUippxis, N. American Tertiary, i 136 

 Ortalida, ii. 343 

 Orthagoriscus, ii. 457 

 Orthalicus, ii. 516 

 ORTHID^, ii. 532 

 ORTHOCERATlDiE ii. 506 

 Orthodon, ii 452 

 Orthogonms, 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 

 ORYCTEROPODIDvE, ii. 246 

 Orycteropns, ii. 24G 

 Orycterus, ii. 231 

 ORYGIN^, ii. 223 

 Oryx, ii. 2:;3 

 Oryzoborus, iL 285 

 Oryzorictes, ii. 188 

 Osmerxis, ii. 447 

 Osphranter, ii. 251 

 Osteobrama, ii. 453 

 Osteochilus, ii. 451 

 Osteogeniostts, ii. 443 

 OSTEOGLOSSIDiE, ii. 454 

 Osteoglossum, ii. 454 

 Ostinops, ii. 282 

 OSTREID^, ii. 533 

 Ostrich, Miocene of N. India, i. 162 

 Ostriches, ii. 368 



