THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 



BALJENOPTERA MUSCULUS (L.). EUROPEAN AND AMERICAN. SCAPULA. 



187 



FIG. 49. FIG. 50. 



BAL^NOPTERA MUSCULUS (L.). EUROPEAN. STERNUM. 



FIG. 49. (STOCKHOLM MUSEUM. FROM VAN BENEDEN.) FIG. 50. OSTEND, BELGIUM. ? AD. 

 (FROM FISCHER.) (SEE p. 185, FOOT-NOTE.) 



RADIUS AND ULNA. 



The radius in the Sulphurbottona is remarkable for its breadth, and the ulna 

 for its strong curvature. In Van Beneden and Gervais's copy of Malm's figure of the 

 Gothenburg specimen (8, pi. 13, fig. 34) and in Dubar's figure (34, pi. 11) the ulna 

 is represented as having a long olecranon process directed downward instead of 

 upward. If this were correct it would at once distinguish the European from the 

 Newfoundland Sulphurbottom, which has an erect or proximally-directed olecra- 

 non, as in B.physalus. It would appear that the process shown in the figures 

 above mentioned is the cartilage attached to the olecranon, which may be ossified 

 in such mature individuals as the Ostend specimen. Gervais's figure of the South 

 American Sulphurbottom represents the process correctly as cartilage (51, pi. 1, 

 fig. 3). With the exception mentioned, the figures of the arm-bones of European 

 Sulphurbottoms agree well with those of the Ocean City, N. J., and Newfoundland 

 specimens shown in pi. 7, figs. 7-9. 



The following actual measurements of the arm-bones are given by various 

 authors : 



Rheinland measure. 



1 From Van Beneden and Gervais's copy of Malm's figure. 



