438 



2419. The skull of a Pteropus. 



The premaxillary bones are here preserved. The sutures are obliterated on the smooth 



convex cranium. 



Hunterian. 



2420. The skull of a Pteropus. Presented by Sir Everard Home, Bart., V.P.E.S. 



2421. The cranium of a Pteropus, longitudinally bisected. 



The rhinencephalic fossa is large and well defined. The petrosal shows a deep cerebellar 

 fossa, overarched by the vertical semicircular canal. 



Presented by Prof. Owen, F.R.S. 



2422. The lower jaw of a large Pteropus. 



The condyles are convex and transversely extended : the coronoid processes are high and 

 broad : the angles of the jaw are slightly produced and rounded off. 



Hunterian. 



2423. Three ribs of a Pteropus, which are partially blended together by ossification 

 of the interosseous substances. Hunterian. 



2424. The lumbar vertebrae, pelvis, and femora of a Pteropus. 



The ischia are confluent at their tuberosities, to which the end of the sacrum is united. 



The symphysis pubis is obliterated by bony union : the spine of the pubis is strongly developed. 



The acetabula are directed upwards and backwards, to which the head of the femur is attached 



, by a ligamentum teres. The two trochanters are nearly equally developed, and are opposite 



each other. 



Hunterian. 



2425. The scapula and clavicle of a Pteropus. The scapula is long and narrow : 

 the coracoid is of unusual length. Hunterian. 



2426. The bones of the wing, or anterior extremity of a Pteropus, with the inter- 

 digital membranes dried and preserved. Hunterian. 



2427. The humerus of a large Pteropus. Hunterian. 



2428. The radius and rudimental ulna, with the detached olecranon, of a large 

 Pteropus. Hunterian. 



