CLASSIFICATION OF BIRDS 



773 



Fig. 464. — Hesperornis. — After Marsh. 



ST Sternum; CO., coracoid ; CL., clavicle ; H., rudimentary humerus ; 

 SC, scapula ; P., pectineal pubic process ; IL., iluim ; IS., ischium ; 

 P.P., post-pubis; C.r., crest of tibia ; P., fibula ; P.P., base of tibio- 

 tarsu's ; T.MT., tarso-metatarsus. 



