OF THE SPERM WHALE. 
87 
part, and it is 3 inches thick at its upper edge, —its 
glenoid cavity is in length 9 inches, and in width 8 
inches. 
OF THE BONES WHICH FORM THE FINS. 
The bones which form the fins are together 4 feet 4 
inches in length, and 1 foot 10 inches at their widest 
part. 
Of the Humerus,— The humerus is 1 foot 7| inches 
in length, its diameter at the head is 9| inches. The 
diameter of its shaft is 6| inches. It expands and 
softens at its carpal end, which is articulated with a 
radius and ulna, which are both ossified in this specimen 
to the humerus. The radius and ulna are 1 foot 1 inch 
in length. The radius is 7 inches broad at the middle 
of its shaft, while the ulna is 5| inches broad at the 
same part, and both are 3| inches in thickness ; they 
expand a little at their carpal extremities. 
Of the Carpus,— There are seven loose square bones 
of the carpus, which are arranged in a straight line 
across the ends of the radius and ulna ; they are each 
about 3 inches square, except that to which the little 
finger is attached; that is long and narrow, being 5 
inches long and 2 J inches wide. 
Of the Phalanges,— There are five phalanges ; the three 
middle ones having four bones each, and the two outer 
ones having only three each. 
