LIST OF ILLUSTRATIONS. xvii 



fig. Page 



243. Internal view of skeleton of turtle . . . . . • 565 



244. Dissection of Chelonian heart (Huxley) . . . . - 565 



245. Heart and associated vessels of tortoise (Nuhn) . . . • 566 



246. Lateral view of brain of Hatteria punctata (Osawa) . 567 



247. Hatteria or Sphenodon (Hayek) 568 



248. Side view of skull of Lacerta (W. K. Parker) . . . 571 



249. Heart and associated vessels of a lizard (Nuhn) . . . 573 



250. Lung of Chamaleo vulgaris, showing air sacs (Wiedersheim) 575 



251. Snake's head (Nuhn) . . . . . , . ■ 578 



252. Skull of grass snake (W. K. Parker) 580 



253. Lower surface of skull of a young crocodile . . 582 

 2J4. Crocodile's skull from dorsal surface .... 584 



255. Half of the pelvic girdle of a young crocodile . . • 585 



256. Origin of amnion and allantois (Balfour) . . . 588 



257. Comparison of pelvic girdles . . . . . . ■ 591 



258. Position of organs in a bird (Selenka) . . . . 595 

 2J9. Diagrammatic section of young bird (Gadow) . . . 596 



260. Entire skeleton of condor, showing the relative positions of ' 



, . - , the chief bones ........ 6oo 



261. Disarticulation of bird's skull (Gadow) . . . 601 



262. Under surface of gull's skull .... 602 



263. Wing of dove . . ... 603 



264. Side view of pelvis of cassowary . . . 604 



265. Bones of hind-limb of eagle ..... 605 



266. Brain of pigeon 606 



267. Diagrammatic section of cloaca of male bird (Gadow) . . 607 



268. Heart and arterial system of pigeon ..... 610 

 268A. Heart and venous system of pigeon . 611 



269. Female urogenital organs of pigeon . .613 

 269A. Male urogenital organs of pigeon 613 



270. Pectoral girdle and sternum of swan . .615 



271. Position of wings in pigeon at maximum elevation (Marey) . 616 



272. Wings coming down (Marey) .... . -617 

 ,273. Wings completely depressed (Marey) . .• . . 617 



274. Diagrammatic section of egg (Allen Thomson) . . . 623 



275. Stages in development of chick (Marshall) .... 624 



276. Diagrammatic section of embryo within egg (Kennel) . . 626 



277. Side view of rabbit's skull . ..... 641 



278. Dorsal view of rabbit's skull 642 



279. Under surface of rabbit's skull . . 643 



280. Rabbit's fore-leg . . .... 644 



281. Rabbit's hind-leg 645 



282. Dorsal view of rabbit's brain, with most of cerebellum cut 



away (Krause) . 648 



283. Under surface of rabbit's brain (Krause) . . . 648 



284. Diagram of csecum in rabbit ...... 650 



285. Duodenum of rabbit (Krause) 651 



286. Circulatory system of the rabbit (Parker and Krause) . . 652 



287. Vertical section through rabbit's head .... 655 



288. Urogenital organs of male rabbit 657 



b 



