SHUFELDT : OSTEOLOGY OF THE STEGANOPODES 



187 



exists in allied species, and in the comparatively small size and regular lyrate form 

 of these openings. From these conditions it will be seen that there is in the cranium 

 an excess of ossification over that found in other cormorants. While no bar of bone 

 has been found in other species, there are hints of it in some, thus, P. penicillatus 

 and P. magellanicus, in the shape of a little bony spike running upward from the 

 alisphenoids, and it is not impossible that the complete bar may be found in some 

 very old individual. This is the more probable because in the young, of P. urile at 

 least, there is a bar of cartilage occupying the place of the bar of bone found in 

 Pallas' Cormorant. 



MEASUREMENTS 13 OF SPECIES OF PHALACROCORAX. 14 [FROM LUCAS.] 



STERNUM. 



SKULL. 



" The sternum (No. 1941 7, U. S. N. M.) found with the present series of bones is 

 important, as its size indicates it to be that of a male, and shows the sternum previ- 

 ously described to have been that of a female, or possibly even that of a male of P. 

 urile. It is very much larger than any sternum of P. urile, and much larger even 

 than the large specimen of P. carbo, used for comparison. 17 The present sternum is 



13 The measurements are in a straight line. 



"Proc. U. S. Nat. Mus., XII., 1889, p. 88. 



15 Estimated, owing to breakage. 



1S Taken from rostrum of one bird and calvarium of another. 



17 Proc. U. S. Nat. Mus., XII., 1889, pp. 88-94. 



