INDEX 



503 



Ichthyopterygium, 158. 

 Ichthyosaurs, food, 47. 



— origin, 20. 



— paddles, 133. 



— parietal foramen, 10. 



— period, 27. 



— size, 6. 



— structure, 103. 



— viviparity, 69. 

 Ide, golden, 370. 

 Idiacanthus, 415. 

 Iguanas, colour of males, 78. 



— food, 51. 



— form of body, 93. 



— hind feet, 95. 



— reproduction, 69. 



— spines, 117. 



Iguanidae, sexual characters, 62. 



— distribution, 41. 

 Ignanodon, food, 51. 



— skull, fig., 138. 



— thumb, 132. 



— posture, g6. 

 Iguanodonts, skeleton, 229. 



— period, 29. 



Ilysia scytale, vestiges of limbs, in. 

 Ilysiida;, distribution, 42. 



— structure and habits, 112. 



— viviparity, 68. 

 Incus, origin, g. 



India, marine fishes, 279. 

 Indian region, fresh-water fishes, 268. 

 Inflation of body in reptiles, 65. 

 Intromittent organs, fishes, 308. 

 Ipnops, blindness, 401. 



— habitat, 288. 



— luminous organs, 412. 



— structure of luminous organs, 430. 

 Iridocytes of Amphibia, 220. 



— of fishes, 422. 



Isistitis brasiliensis, emission of light, 



421, 

 Islands, Amphibia, 179. 



— reptiles, 36. 



Iwaji Ikeda, on habits of Glandiceps, 

 490. 



Jacoby, on male eel, 349. 



Jaeger, on origin ot air-bladder, 390. 



Jameson, H. L., on spitting of snakes, 



148. 

 Johnston, J. B., on swimming of Am- 



phioxus, 466. 



— on nervous system of Amphioxus, 



461. 



Kabeljaaw, 277. 

 Kara Shiwo, 293. 

 Katadromous fishes, 297. 

 Kent, Savile, on association of Amphi- 

 prion percula, 300. 



Keraterpeton, 171. 



King klip-fish, 277. 



King salmon, migrations, 297. 



Kjellburg, on origin of incus, 9. 



Kollmann, on neoteny, 217. 



Kowalewskia, 479. 



Krefft, Dr. Paul, on Draco volans, 98. 



Kreidl, on hearing in gold-fish, 391. 



Labrid^, habitat, 273. 



Labrus mixtus, sexual character, 311. 



Labyrinthodonts, 160. 



— relation to Amphibia, 171. 



— skull, 10. 



Lacerta, colour of British species, 80. 



— muralis, stripes, 76. 



— ocellata, coloration, 7g, 88. 



— vivipara, 67. 

 Lacertidae, distribution, 41, 42. 

 Lachesis lanceolata, 82. 



— monticola, 68. 



— wagleri, 81. 



colour, 86. 



Lczmargus borealis, 284. 

 Lampetra planeri, 451. 

 Lampreys, characters, 449. 



— differences from fishes, 233. 



— habits, 450. 



— genera, 453. 

 Lampris I una, 283. 

 Lancelets, distribution, 463. 



— external characters, 458. 



— feeding, 464. 

 Land-iguana, food, 52. 

 Land-tortoises, giant, 127. 

 Larva, of Amphibia, 184, 226. 



— of Amphioxus, 471. 



— of Ascidians, 486. 



— of Lampreys, 451. 



— of Lancelets, 460. 

 Larvacea, 47g. 

 Latchet, voice, 405. 

 Lateral line, of fishes, 244. 



— sense-organs, 3g4, 3g5. 

 Leathery turtle, see Luth. 

 Lee, on hearing of fishes, 391. 

 Leighton, Dr. G. B., on fracture of tail 



in lizards, 152. 

 Leiostomus, voice, 406. 

 Lcpidopus caudatus, 279, 281. 

 Lepidosiren, air-bladder, 384. 



— habitat, 267. 



— nest, 319. 



— sexual characters, 309, 320. 

 Lepidosteus, air-bladder, 383. 



— evolution, 258. 



— ganoid scales, 236. 



— larva, 342. 



— spawning, 321. 

 Leptocephali, 348. 

 Lcptocephalus brevirostris, 352, 353. 



