816 







5237. The metacarpal of the right pollex. 



It is much longer than in the Chimpanzee. 



5238. The rnetacarpal of the right index. 



It is one-fourth shorter than in the Chimpanzee, but is a thicker bone. The proximal ar- 

 ticulation is concave transversely, but not angularly impressed or notched anteriorly as in the 

 Chimpanzee : the surface for the adjoining metacarpal, which is divided by a groove in the 

 Chimpanzee, is here single. The shaft of the bone is straighter, the back part flatter, and 

 its distal convexity broader, than in the Chimpanzee. 



5239. The metacarpal of the right medius, or third digit. 



It is one-third shorter than in the Chimpanzee, and does not equal in length the metacarpal 

 of the index. The proximal articular surface is almost flat, and is continued into the lateral 

 surface upon each side of the base. The bone is straighter, and the plantar surface more 

 acute, than in the Chimpanzee. 



5240. The metacarpal of the right annularis, or fourth digit. 



This bone is more than one-third shorter than the corresponding bone in the Chimpanzee. 

 The proximal articular surface is nearly flat, and is narrower transversely than in the Chim- 

 panzee. The surface for the middle metacarpal is divided by a groove into two portions, the 

 one next the back of the bone being insulated, not continuous with the proximal surface as in 

 the Chimpanzee. 



5241. The metacarpal of the right minimus, or fifth digit. 



This is shorter, but is broader transversely, than the preceding, and its proximal articular 

 surface is more extended transversely than in the Chimpanzee. 



5242. The proximal phalanx of the right pollex. 



This is longer and thicker than in the Chimpanzee. 



5243. The proximal phalanx of the right index. 



5244. The proximal phalanx of the right medius. 



5245. The proximal phalanx of the right annularis. 



