38 



PROFESSOR STRUTHERS. 



digits II. and V., which bring their number up to that of the 

 ossified bones in the mature B. musculus ; and unossified carti- 

 lages in digits III. and IV., which would, if ossified, bring their 

 number up to 9 each. Megaptera, therefore, has at most, if at 

 all, one more phalanx in its two long digits than B. musculus. 

 The great length of the second digit in Globicephalus melas 

 (Digit I, 4 bones ; II, 14 ; III, 9 ; IV., 3 ; V., 1) is obtained 

 by increasing the number of the bones, but Megaptera, true to 

 its affinities, gains the great length of its two long digits by 

 elongation of the bones. 



12. TABLE IV., showing, in inches, the Length of the Digits 

 and the Length, Breadth and Thickness of the Bones in 

 each. Farther Cartilages are indicated by the letter C. 



In this B. musculus the state of the terminal cartilages could not be ascer- 



