178 



MEMOIRS OF THE CARNEGIE MUSEUM 



"The number of ribs articulating with the sternum is, however, subject to slight 

 variations, especially among water birds, and without an extensive series of speci- 

 mens it is a little difficult to be sure of the normal number. 



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



Flo. 24. Right coracoid, ventral aspect. FIG. 25. Sternum, ventral aspect. Flo. 26. Femur, anterior aspect. 

 FIG. 27. Tarsus, anterior aspect. FIG. 28. Tibia, anterior aspect. 



