XX LIST OF ILLUSTRATIONS. 



FFG. 



346. Snake's head after Nuhn . 



347. Skull of grass-snake from W. K. Parker 



348. Lower surface of skull of a young crocodile 



349. Cervical vertebra of crocodile 



350. Crocodile's skull from dorsal surface 



351. Pectoral girdle of crocodile . 



352. Half of the pelvic girdle of a young crocodile . 

 353- Origin of amnion and allantois after Balfour 



353A. Vertical section through backbone and ribs of a Chelonian 

 and a Mammal in part after Jacket 



354. Position of organs in a bird after Selenka . . Facing 

 354A. Anterior view of a dorsal vertebra of an ostrich from a 



specimen . . . ... 



355. Fore-limb and hind-limb compared .... 



356. Diagrammatic section of young bird after Gadow . 



357. A falcon ....... 



358. Young bearded griffin (Gypiietus barbatus\-*-*&zt Nitzsch . 



359. Young feather and filoplume after Nitzsch 



360. Types of feathers ...... 



361. Parts of a feather after Nitzsch .... 



362. Entire skeleton of condor, showing the relative positions of 



the chief bones ...... 



363. Disarticulation of bird's skull after Gadow. Membrane 



bones shaded ...... 



364. Under surface of gull's skull 



365. Wing of dove ...... 



365A. Pectoral girdle and breastbone of an eagle . Facing 



366. Side view of pelvis of cassowary .... 



367. Bones of hind-limb of eagle ..... 

 3b7A. Pelvic girdle and hind-limb of a fowl . . Facing 



368. Brain of pigeon ...... 



369. Diagrammatic section of cloaca of male bird after Gadow . 



370. Heart and arterial system of pigeon .... 



371. Heart and venous system of pigeon .... 



372. Female urogenital organs of pigeon .... 



373. Male urogenital organs of pigeon .... 



374. Pectoral girdle and sternum of swan 



375. Position of wings in pigeon at maximum elevation from 



Marey .... . . 



376. Wings coming down from Marey .... 



377. Wings completely depressed from Marey . 



378. Stages in development of chick after Marshall 



379. Diagrammatic section of egg after Allen Thomson 



380. Diagrammatic section of embryo after Kennel 



381. Hesperornis after -Marsh . . . 

 38 1 A. Fore and hind limbs of rabbit . 



3816. Pectoral girdle and adjacent parts in a gibbon from a 

 specimen . . . . . Facing 



382. Diagram of skull bones (partly after Flower and W T eber), 



the membrane bones shaded 



