428 



INDEX. 



Hystricomorpha, 390. 

 Hystrix, 391. 



Ibex, 400. 

 Ibis, 348. 

 Ichthyophis, 288. 

 Ichthyopsida, 226. 

 Ichthyopterygia, 312. 

 Ichthyornis, 344. 

 Ichthyosauria, 312. 

 Ichthyosaurus, 313. 

 Ichthyotomi, 237. 

 Ictobius, 255. 

 Ictopsidae, 385. 

 Iguanidae, 319. 

 Iguanodon, 317. 

 Ileocolic valve, 36. 

 Iliac artery, 190. 

 Iliac vein, 197. 

 Ilium, 171. 

 Impennes, 347. 

 Implacentalia, 375. 

 Impregnation, 5. 

 Incisors, 364. 

 Incus, 74, 159. 

 Indeciduata, 374. 

 Indicator, 348. 

 Indris, 415. 

 Ineducabilia, 361. 

 Infraclavicle, 169. 

 Infratemporal fossa, 166. 

 Infundibula, 30. 

 Infundibulum, 52. 

 Ingluvies, 34. 

 Inia, 408. 

 Iniomi, 256. 

 Innominate vein, 197. 

 Insectivora, 384. 

 Insertion of muscle, 112. 

 Intercalary cartilages, 234. 

 Intercentrum, 137. 

 Intercostal arteries, 191. 

 Intercostal vein, 196. 

 Interhyal, 244. 

 Intermedium, 176. 

 Internal carotid, 183. 

 Internasal gland, 21. 

 Interoperculum, 161. 

 Interrenal, 131. 

 Interspinalia, 230. 

 Interspinoiis ligament, 137. 

 Intestinal caecum, 39. 

 Intestinalis nerve, 64. 

 Invagination, 5. 



Invertebrates, i. 

 Involuntary muscle, 12. 

 Ipnops, 256. 

 Iris, 83. 



Ischiatic artery, 191. 

 Ischiromyidae, 390. 

 Ischium, 171. 

 Ischyodus, 242. 

 Ischyrhiza, 257. 

 Isectolophus, 395. 

 Isinglass, 251. 

 Isodectes, 305. 

 Isolating cells, 67. 

 Isospondyli, 255. 

 Isteus, 257. 

 Iter, 50. 

 Ivory, 19. 

 lynx, 351. 



, 349. 

 Jackal, 412. 

 Jacobsoii, organ of, 77. 

 Jacobson's commissure, 63. 

 Jaguar, 4 1 2. 

 Jerboa, 390. 

 Jugal, 163. 

 Jugular fins, 231. 

 Jugular foramen, 166. 

 Jugular vein, 183. 

 Jumping mice, 390. 

 Jumping shrews, 385. 

 Jungle fowl, 350. 



Kangaroo, 380. 

 Kangaroo rat, 380. 

 Keraterpeton, 283. 

 Keratobranchial, 154. 

 Keratohyal, 155. 

 Kidney, 122. 

 Killer whale, 408. 

 Killifish, 257. 

 Kingbird, 351. 

 Kingfisher, 348. 

 King of the herrings, 242. 

 Kinosternidas, 311. 

 Kinosternon, 311. 

 Kiwi, 346. 

 Knee pan, 360. 

 Koala, 380. 

 Kogia, 409. 

 Kupffer's vesicle, 254. 



Labial cartilage, 156. 

 Labridae, 260. 



Labrus, 260. 

 Labyrinth, 71. 

 Labyrinthici, 262. 

 Labyrinthodon, 284. 

 Labyrinthodonta, 283. 

 Labyrinthodontidae, 284. 

 Lacerta, 320. 

 Lacertidae, 320. 

 Lacertilia, 318. 

 Lachrymal bone, 161. 

 Lachrymal duct, 76. 

 Lachrymal gland, 84. 

 Lactophrys, 267. 

 Lacuna, 15. 

 Laelaps, 316. 

 Lagena, 71. 

 Lagomorpha, 391. 

 Lagomyidae, 391. 

 Lagomys, 391. 

 Lagostomus, 391. 

 Lamella, 15. 

 Lamina cribrosa, 357. 

 Lamina terminalis, 50. 

 Lamna, 239. 

 Lamnidae, 239. 

 Lampetra, 223. 

 Lamprey eels, 223. 

 Laopteryx, 344. 

 Laosaurus, 317. 

 Lariosaurus, 306. 

 Larus, 349. 

 Larynx; 28. 

 Lateralis nerve, 64. 

 Lateral line, 68. 

 Lateral plate zone, 101. 

 Leather back tortoise, 310. 

 Leather turtle, 310. 

 Lebias, 257. 

 Lemming, 390. 

 Lechriodonta, 285. 

 Lemur, 415. 

 Lemuridae, 415. 

 Lemuroidea, 414. 

 Lens, 8 1. 

 Leopard, 412. 

 Lepidocottus, 260. 

 Lepidopus, 263. 

 Lepidotus, 252. 

 Lepidosauria, 317. 

 Lepidosiren, 273. 

 Lepidosteidae, 251. 

 Lepidosteus, 251. 

 Lepomis, 259. 

 Leporidae, 391. 



