LIST OF ILLUSTRATIONS. xvii 



FIG. PAGE 



200. Skull of grass snake. (W. K. PARKER), . . . 581 



201. Lower surface of skull of a young crocodile, . . 584 



202. Crocodile's skull from dorsal surface, . . . 585 



203. Half of the pelvic girdle of a young crocodile, . . 586 



204. Origin of amnion and allantois. (BALFOUR), . . 590 



205. Comparison of pelvic girdles of cassowary, Iguanodon, and 



crocodile, . . . . . . 593 



206. Position of organs in a bird. (SELENKA), . . 597 



207. Diagrammatic section of young bird. (GADOW), . " 598 



208. Disarticulation of bird's skull. (GADOW), . . 602 



209. Under surface of gull's skull, .... 603 



210. Wing of dove, ...... 604 



211. Side view of pelvis of cassowary, .... 605 



212. Bones of hind leg of eagle, .... 606 



213. Brain of pigeon. (BRONN), .... 607 



214. Diagrammatic section of cloaca of male bird. (GADOW), . 608 



215. Circulation of pigeon. (PARKER), .. . . 609 



216. Urinogenital organs of pigeon, .... 612 



217. Diagrammatic section of egg. (ALLEN THOMSON), . 613 



218. Stages in development of chick. (MARSHALL), . . 615 



219. Diagrammatic section of embryo within egg. (KENNEL), 616 



220. Pectoral girdle and sternum of swan, . . . 622 



221. Position of wings in pigeon at maximum elevation. 



(MAREY), ....... 623 



222. Wings coming down. (MAREY), .... 624 



223. Wings completely depressed. (MAREY), . . . 624 



224. Segmentation of rabbit's ovum. (VAN BENEDEN), . 648 



225. Development of hedgehog. Three early stages. (HUBRECHT), 649 



226. Two stages in segmented ovum of hedgehog. (HUBRECHT), 650 



227. Development of foetal membranes. (HERTWIG), . . 652 



228. Diagram of foetal membranes. (TURNER), . . 653 



229. View of embryo of rabbit, with its foetal membranes. 



(KENNEL), ...... 657 



230. Side view of rabbit's skull, , ... . . 662 



231. Dorsal view of rabbit's skull, . . . .663 



232. Under surface of rabbit's skull, .... 664 



233. Rabbit's fore leg, ...... 665 



234. Rabbit's hind leg, ...... 665 



235. Dorsal view of rabbit's brain. (KRAUSE), . . 667 



236. Under surface of rabbit's brain. (KRAUSE), . . . 667 



237. Diagram of caecum in rabbit, . . . 670 



238. Duodenum of rabbit. (CLAUDE BERNARD), . 671 



b 



