INDEX 



505 



Monitors, 41, 51, 84. 



Monopterus, 300. 



Moreau, on Trigla hirundo, 405. 



Mormyridas, 433. 



Mosasaurs, 106. 



Mouth gestation of fishes, 328, 331. 



Mud-eels, 164. 



Mud-skippers, 376, 



Murcenosaurus, 105. 



Murray cod, 269. 



Mustelus Icbvis, placenta, 316. 



Mutations, 359, 364. 



Myctophidae, 410. 



— luminous organs, 424. 

 Myctophum, 288. 



Myrus pachyrhynchus, 288. 

 Myxine, 442, 443. 

 Myxinoids, 442. 



— genera, 448. 



Naja haje, spitting, 148. 



N aosaurus claviger, no. 



Narcine, electric organs, 432. 



Native salmon, 282. 



Natterjack toad, 166. 



Natural selection, of electric organs, 



437- 



in flat fishes, 374. 



Naucrates ductor, 305. 



N ectophryne tormeri, reproduction, 198. 



Necturas maculatus, 164. 



Neoteny rn Amphibia, 214. 



Neotropical region, Amphibia, 179. 



Nephridia of Lancelets, 464. 



Nerophis, reproduction, 331. 



Newts, 161. 



New Zealand, Amphibia, 179. 



— marine fishes, 281. 



Nomeus gronovii, association with 



Physalia, 307. 

 North America, fresh-water fishes, 266. 



— marine fishes, 275. 



Northern Asia, fresh-water fishes, 365. 

 Nostrils in bony fishes, 242. 



— in reptiles, 117, 134, 135. 

 Notochord, in Ascidians, 482. 



— in Cephalodiscus, 493. 



— in fishes, 233. 



— in Lancelets, 458, 459. 

 Notoga?a, Amphibia, 179. 

 Nototrema, allantoic gills, 227. 



— pouch, 229. 



— reproduction, 195, ig6. 

 Number of species, Amphibia, 176. 



— fishes, 261. 



— reptiles, 30. 



— Tunicates, 483. 



— of Vertebrate classes, 30. 



Old Red Sandstone Fishes, 251. 

 Oligorus macquaviensis , 269. 



Olm, 164. 



Oncorhynchus, 277, 297, 310. 

 Onirodes glomerosus, blindness, 402. 

 Operculum, of Amphibia, 159, 211. 



— of bony fishes, 242. 



— of Urodela, 161. 

 Ophiocephalidae, 299, 380. 

 Omosaurus, 144. 

 Ophiops, eyelid, 116. 

 Ophisaurus apus, see Glass-snake. 

 Ophthahnosaurus, 102. 



— beak, 136. 



— paddles, 134. 

 Opisthoglypha, 144. 

 Opsanus tan, voice, 407. 

 Orfe, golden, 370. 

 Ornithomorpha, ankle-joint, 12. 



— evolution, 18. 



— period of origin, 26. 

 Ornithosauria, 22, 28, 99. 

 Orthopoda, 23. 



Omithomimus, bipedal gait, 96. 

 Ornithopoda, 29. 

 Orthagoriscus viola, habitat, 273. 



— sound production, 410. 



Osborn, Prof. H. F, on Theriodontia,i8. 

 Osmerus, 343, 382. 

 Osphromenidae, aestivation, 299. 



— labyrinthine organs, 380. 



— nest, 324. 

 Ostariophysi, 393. 

 Osteoglossum, habitat, 267. 

 Osteolcemus, dermal armour, 119. 

 Osteolepis, 254. 

 Ostracoderms, 250, 455. 

 Otoliths, fishes, 244, 348. 



Pacific, North, fishes of, 275. 

 Paddles, of reptiles, 132. 

 Pairing of Amphibia, 183. 

 Painted terrapin, courtship, 66. 

 PalcEobatrachus, 173. 

 Palczohatteria, 19, 26. 

 Palaeoniscidas, 257. 



Palasotropical region, Amphibia of, 180. 

 Palate in reptiles, 134, 135. 

 Paludicola, nest, 189. 

 Pantodon buchholtzii, 376. 

 Papuasia, Amphibia, 180. 

 Paradise-fish, nest, 324. 



— labyrinthine organ, 380. 

 Paramphioxus, 463. 

 Parasitism in fishes, 307. 

 Parasuchia, 9, 26. 

 Pariasaurus, 10, 16. 

 Parietal foramen, 10, n. 



Parker, G. H., on hearing of fishes, 390, 



392. 



— on lateral line organs, 394. 



— on sensory reactions of Amphioxus, 



466. 



