SHUFELDT : OSTEOLOGY OF THE STEGANOPODES 



177 



" It is certainly interesting to find the sterna of these two representatives of the 

 snbgenera Phalacrocorax and Urile, respectively, agreeing with one another in these 

 slight structural points. 



" Articulations are present for five pairs of ribs, the same number as in carbo. One 

 specimen of urile has four pairs of articulations, another has five on the left side and 

 four on the right, and dilophus has but four pairs of costal facets. 



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Bones of Pallas' Cormorant. Natural size. After Lucas. 



Flo. 19. Ventral aspect of rostrum. FIG. 20. Lateral aspect of rostrum. Fici. 21. Right ramus of lower 

 mandible, external aspect. FIG. 22. Right ramus of lower mandible, internal aspect. FIG. 23. Right metacarpals. 



