J u - 



THE MANUS. 



[CHAP. 



Id 



bone, althcugh the first meta- 

 carpal so often assumes the 

 characters and position of a 

 carpal bone, that it may easily 

 be taken for it. 



The cuneiform always di- 

 rectly supports the fifth m eta- 

 carpal, and frequently some 

 part of the fourth. Moreover, 

 in those species in which the 

 ulnar side of the carpus is 

 greatly reduced, as Globice- 

 phalus, the fifth metacarpal is 

 even connected with the ulna. 



In the Cachalot (Physeter} 

 many of the carpal bones, in 

 addition to the usual central 

 nucleus, have epiphysial ossifi- 

 cations developed in the peri- 

 phery of the cartilage, which 

 ultimately unite with the cen- 

 tral piece of bone. 



All the Cetacea with teeth 

 have five digits, though the 

 first is usually rudimentary 

 and in close contact with the 

 metacarpal of the second. 



G. 1 05. -Dorsal surface of bones of In SOllie forms, as PJiyseter, 

 right anterior limb of Round-headed 7 - r 7 , .. T-> ? 



Dolphin (Globicephalus melas), T V Hyperondon, MOlWdon, beluga, 

 The shaded portions of the digits are T . 7-., j x-> i 



cartilaginous. U trapezoid or magnum, inia, riCttamsta, and (JrCd, the 



manus is short, broad, and 



rounded at its distal extremity ; the digits being nearly 

 equally developed, spreading from each other, and without 



_zr 



