GENERAL INDEX. 



591 



Odojitochila, ii. 4S6 

 Odaiitolabris, ii. 493 

 Odontophorvs, ii. 339 

 Odonlophrynus, ii. 420 

 CEdemii',, ii. 364 

 CEdicnemif, ii. 355 

 Oedura, ii. 399 

 ffijK.ii. 332 

 Ogmodon, ii. 383 

 Ogyris, ii. 477 

 Oligdon, ii. 375 

 OLIGODONTID^, il. 374 

 OUgosarciis, ii. 445 

 Olisthopus, ii. 489 

 Oiylogon, ii. 418 

 Oii/ra, ii. 442 

 Om/scus, ii. 489 

 Ommatophoca, ii. 204 

 Omolepida, ii. 397 

 Onjosfenus, ii. 492 

 Omphalotropis, ii. 521 

 Omus, ii. 4S7 

 ONCIDIAD^, ii. 517 

 Oncidmm, ii. 518 

 Onychodactylus, ii. 413 

 Onychogale, ii. 195 

 Onychogalea, ii. 251 

 Onychognathus, ii. 288 

 Onchorhynchus. ii. 447 

 Oncosioma, ii. 101 

 Opliidia, classification of, i. 99 

 OPHIDIA, ii. 372 



remarks on tlie general distribution of, ii. 



386 

 fossil, ii. 387 

 0PHIDI1D.E, ii. 440 

 Ophidluvi, ii 440 

 OPHIOCEPHALIDvE, ii 435 

 Ophiodes, ii. 397 

 OPHIOMORID^, ii. S9S 

 Ophiomorus, ii. 398 

 Ophiophagus, ii. 383 

 Ophiops, ii 391 

 Op/itoscuieus, ii. 397 

 Ophisam^is. ii. 392 

 Ophites, ii. 380 

 Ophomis, ii. 489 

 Ophryodcra, ii. 487 

 Ophysia. ii. 209 



OPISTHO-BRANCHIATA, ii. 529 

 OPISTHOCOMI, ii. 34> 

 Opisthocomus, Brazilian caves, I. 164 



ii. 345 

 Opistkoddphys, ii. 418 

 Opisthostovw, ii. 520 

 OpistJioporus, ii. 520 

 Oporortiis, ii. 279 



Opossum, extinct in European Miocene, i, 121 

 Opossums, ii. 248 

 Opsariichthys, ii. 452 

 Opsiphanes, ii. 472 

 Orang-utan, ii. 171 

 Orca, ii. 209 

 Orcadla, ii. 209 

 Orchesticiis, ii. 99 

 Orchilns, ii. 101 

 Orens, ii. 223 

 Oreicola, ii. 260 

 Oreinvs, ii. 452 

 Oreocephalus, ii. 401 

 Oreocinda, ii. 256 

 Oreodeira, ii. 401 



Oreodon, N. American Tertiary, i. 138 

 Oreodontidce, N. American Tertiary, i, 138 

 0/-ca'ca, ii. 271 

 Oreomowes, ii. 278 



Oreonectes. ii. 453 

 Oreonympha, ii. 108 

 Oreoperdix, ii. 338 

 OKEOPHASIN/E, ii. 343 

 Oreophasis, ii. 343 

 Oreophilvs, ii. 356 

 Orecpyra, ii. 107 

 Oreortyx, ii. 339 

 Oreoscoptes, ii. 256 

 Oreoihraupis, ii. 99 

 Oreotrodulus, ii. 107 

 Orestias, ii. 4.50 

 Oriental region, defined, i. 76 

 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. 318 

 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, 1. 



265 

 Oriental and Palsearctic faunas ouoe identical, 



i. 362 

 Oriental and Ethiopian faunas, cause of their 



resemblances, i. 363 

 Origma, ii. 260 

 Oriocalotes, ii. 402 

 Orioles, ii. 268 

 ORIULID.E, ii. 268 

 Oriohis, ii- 26S 

 Orites, ii. 268 

 Ornithion, ii. 101 



0RN1TH0RHYNCHID.E, ii. 253 

 Ornithorhyndnis, ii. 253 

 Oroca'tes, ii. 256 



Orohippus, N. American Tertiary, i 136 

 Ortalida, ii. 343 

 Orthagoriscus, ii. 457 

 Orthalicus, ii. 516 

 ORTHIDjE, ii. 532 

 ORTHOCERATID^ ii 506 

 Orthodon, ii 452 

 Orthogonius, ii. 491 

 Orthogonys, ii. 98 

 Orthonyx, ii. 200 

 Ofthorhynchvs, ii. 108 

 Orihotomus, ii. 257 

 Ortygometra, ii. 352 

 Ortvgornis, ii. 338 

 Oriyx, ii. 339 

 Ortiixdos, ii. 341 

 : ORYcTEROPODID.^, ii. 248 

 Oryderopus, ii. 246 

 Oniderns, ii. 231 

 ORYGIN^, ii. 223 

 Oryx, ii. 2l3 

 Oryzoboms, ii. 285 

 Oryzorides, ii. 188 

 Osmeriis, ii. 447 

 Osphranter, ii. 251 

 Osteobrama, ii. 45:'. 

 Osteochilus, ii 4.'il 

 Osteogeniosus, ii. 44:' 

 OSTEOGLOSSID^, ii. 454 

 Osteoglossnm, ii. 454 

 Ostinops, ii. 282 

 ObTREID.E, ii. 533 

 Ostrich, Miocene of N. India, 1. 162 

 Ostriches, ii. 368 



