186 THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 
J., specimen, and of a seapula which I photographed at Balena whaling station, are 
shown in the accompanying text figures 45 to 48. See also pl. 7, figs. 5 and 6, 
Fic. 45. Fic. 46. 
oe 
FIG. 47. Fic. 48. 
SCAPULA OF BALAZNOPTERA MUSCULUS (L.). 
Fic. 45.—OsTENnD, Be.cium. Ab. 2. (FROM Dupar.) Frc. 46.—SWEDEN. (FROM VAN BENEDEN AND GERVAIS.) 
Fic. 47.—BALENA STATION, NEWFOUNDLAND. AD. (FROM A PHOTOGRAPH.) FIG, 48.—OCEAN City, 
New JersEY. IM. 2. (FROM A PHOTOGRAPH.) 
These figures show the strongly projecting anterior and posterior borders, 
evenly convex superior border, and large acromion, characteristic of the Sulphurbot- 
toms. What the range of variation in form may be in European and American 
specimens, and whether specific differences could be detected, cannot of course be 
determined at present for lack of material. It is to be expected that considerable 
individual variation will be found, and this is indicated in the two figures of scapule 
from American specimens, which while agreeing in general form, show differences 
in detail. 
The dimensions of scapule in different specimens and the proportion of the 
breadth to the height in the same are shown in the table on p. 187. The discrep- 
ancy in proportions, amounting to about 4 per cent., I am unable to account for. It 
affects both the American and European specimens and is not, apparently, due to 
difference in age or sex. The diameter of the glenoid fossa in the scapula of the 
Ocean City skeleton is 13 in. by 94 in.; the greatest length of the acromion is 16 in. 
