THE SKELETON IN BIRDS. THE PECTORAL GIRDLE. 337 



FIG. 63. SHOULDER-GIRDLE AND STERNUM OF 



A. BLACK VULTURE (Vultur cinereus)x%. 



B. PEACOCK (Pavo cristatus) x f . 



C. PELICAN (Pelicanus conspic Hiatus) x ^. (All Camb. Mus.) 



1. carina of the sternum. 6. surfaces for articulation with 



2. coracoid. the sternal ribs. 



3. scapula. 7. xiphoid processes. 



4. clavicle. 8. fontanelle. 



5. costal process. 



R. 22 



