xxiv LIST OF ILLUSTRATIONS 



FIG. PAGE 



258. Rana temporaria, stages in life-history .... 430 



259. Salamandra maculosa 432 



260. Siren lacertina 433 



261. Pygopus lepidopus 437 



262. Hatteria punctata 438 



263. Grecian tortoise, Testudo graeca 439 



264. Skeleton of crocodile 441 



265. Cistudo lutaria 442 



266. Chelone midas 443 



267. Skull of rattlesnake 445 



268. Pectoral arch and sternum of Lacerta agilis . . . 446 



269. Heart of monitor, Varanus 448 



270. Brain of alligator, from above 449 



271. Pineal eye of Hatteria punctata, section . . . .451 



272. Poison apparatus of rattlesnake 454 



273. Columba livia, diagram with most of feathers removed . 458 



274. Columba livia, feather 460 



275. Pterylosis of Columba livia 462 



276. Columba livia, bones of the trunk 463 



277. Columba livia, cervical vertebra 464 



278. Columba livia, sacrum of nestling 465 



279. Columba livia, skull of young 466 



280. Columba livia, hyoid apparatus 467 



281. Columba livia, bones of left wing 468 



282. Columba livia, bones of left manus of nestling . . . 469 



283. Columba livia, left innominate of nestling .... 470 



284. Columba livia, bones of left hind-limb . . . -471 



285. Columba livia, part of left foot of embryo .... 472 



286. Columba livia, muscles of left wing 473 



287. Columba livia, dissection from right side .... 475 



288. Heart of pigeon, dorsal aspect 478 



289. Columba livia, brain, different views 479 



290. Eye of pigeon 480 



291. Columba livia, right membranous labyrinth of ear . .481 



292. Columba livia, male urinogenital organs .... 482 



293. Columba livia, female urinogenital organs .... 482 



294. Feather of cassowary 484 



295. Wing of nestling of Opisthocomus and of adult Apteryx . 486 



