1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 299 



They are created by this hinder portion of the bone being so pro- 

 foundly one-notched that a general concave margin has resulted, with 

 simply a median papilliform process remaining (Fig. 29). 



§ 



Fig. 29. Sternum of Sulci bassanct; pec! oral aspect; life size. By the author, from the same specimen 



shown in Figs. 24 ct seq. 



The carina juts out very prominently in front of the bone; its anterior 

 angle showing a large facet, concave from above downward, for the 

 furcula, which in life articulates with it. Above this the border is again 



