THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 



BALMNOPTERA MDSCULUS (L.). EUROPEAN AND AMERICAN. SCAPULA. 



187 



Locality. 



Holland 



Baltic (1862) 



North Berwick, Scotland . . 



Gothenbura;, Sweden 



Sex. 



Sylt, Germany 



Ostend, Belgium 



Balena Station, Newfoundland,! .. 

 Ocean City, N. J ? 



Total 

 Length. 



ft. in. 

 50 ± 



51 7 

 50 o' 



66 "2 



Length of 

 Skeleton. 



ft. in. 



46 + 



78 O 



49 7 



43 o 



Breadth. 



35-5 



3«.2S' 



60 



31 



693 



61 



495 



Scapula. 



Height. 



23-5 

 38 



20 

 42.1 



38.S 

 30.0 



I'roportion 

 of Height 

 to Breadth. 



i 

 60 

 61.4 

 633 

 64.4 = 



64.4 

 60.0 

 63.1 

 60.6 



Author. 



Flower. 



Miinter. 



Knox. 



Van Beneden 



and Gervais. 



Mobius. 



Dubar. 



F. W. T. 



F. VV. T. 



Fig. 49. Fig. 50. 



bal^noptera musculus (l.). european. sternusr. 



Fig. 49. — (Stockholm Museum. From Van Beneden.) Fig. 50. — Ostend, Belgium. V An. 

 (From Fischer.) (See p. 185, foot-note.) 



RADIUS AND ULNA. 



The radius iu the Sulphurbottom is remarkable for its breadtb, 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 figui'e (34, pi. 11) the ulna 

 is represented as having a long olecranon process dir'ected downward instead of 

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

 Newfoundland Sulphurbottom, wliich has an ei-ect or proximally-directed olecra- 

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

 above mentioned is the cartilage attached to the olecranon, Avhich 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 tbe 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 



o 



authors : 



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



