IIS'DEX. 



425 



Mystriosaurus, 329. 

 Mytilicloe, 148, 166, 207, 271. 



Naiadites, 209. 



Narica, 269. 



Narwhal, 344. 



Nasua, 390. 



Natica, 166, 207, 262, 269. 



Nautilus, 137, 145, 192, 207, 213, 265- 



267. 

 Neaera, 263. 

 Necrolemur, 348, 403. 

 Nectarinea, 87, 94, 102, 106. 

 Nectarophila, 94. 

 Necturus, 306. 

 Nematocarcinus, 112. 

 Neobalsena, 345. 

 Neolimulus, 279. 

 Neophron, 106. 

 Neoplajfiaulax, 336. 

 Neotropical realm, 73. 

 Neritiua, 1 66, 209, 211. 

 Nesokerodon, 363. 

 Ncsokia, 355. 

 Nestor, 102. 

 Neurogyinnurus, 347. 

 Neuroptera, 279, 282, 283. 

 Neurotrichus, 348. 

 Newt, 306. 

 Night-ape, 395, 396. 

 Nightingale, 65, 70. 

 Nimravus, 385. 

 Noctiluca, 122. 

 Notelephas, 366. 

 Nothosaurus, 159. 

 Notidanus, 297, 300. 

 Notornis, 333. 

 Nototherium, 338. 

 Nuculidse, 148, 207, 263, 271. 

 Numidinse, 88. 

 Nummulites, 152, 173, 189. 

 Nuthatch (fossil), 65, 330. 

 Nutria, 390. 

 Nycticcbus, 401. 

 Nycticejus, 351. 



Nyctiornis, 94. 

 Nyctipitiiecus, 395, 396. 

 Nylghau, 378. 



Obolella, 255. 



Obolus, 145, 257. 



Oceanic basins, permanency of, 220. 



Ocelot, 383. 



Oculina, 248, 249. 



Odontopteryx, 331. 



Odontornithes, 330. 



Oeningen, insects of, 284. 



Olenus, 146. 



Oligobunis, 388. 



Olividas, 169, 270. 



Oinphyma, 143. 



Onager, 370. 



Onchus, 142, SOO. 



Onychogale, 96. 



Onychoteuthis, 138. 



Ophibolus, 323. 



Ophiderpeton, 310, 311. 



Ophidia, distribution of, 320. 



Ophidiida;, 299. 



Ophioderma, 166. 



Ophioglypha, 166. 



Ophiophagus, 322, 325. 



Ophiosaurus, 316. 



Ophiura, 111. 



OphiuroUa, 166. 



Ophiuroidea (deep-sea). 111. 



Opistliocomu.-s, 81. 



Oposfum, 334. 



0[)pelia, 267. 



Oracanthus, 152. 



Orbicella, 248. 



Orbiculina, 234. 



Orbitoide.'?, 173. 



Orbitolites, 234. 



Orbulina, 109, 235-237. 



Orca, 343. 



Orcella, 343. 



Orders, distribution of, 32. 



Oreodon, 382. 



Oreopithecus, 400. 



