Comparative Mi/olog-i/ of the Chimpanzee. 305 



of the Sterno-clcido-mastoid is very small, the whole ap- 

 pearing as one muscle, which is almost wholly attached to 

 the clavicle, and there are not two separable portions ; 

 but in Prof. Wyman's specimen it resembled that of this 

 Chimpanzee. 



Trapezius. I noticed no difference in this from the hu- 

 man, except that its lower border, instead of overlapping 

 the upper border of Latissimns dorsi, seemed to be con- 

 tinuous with it, as mentioned by Vrolik, who says that 

 this connection does not exist in other apes. Tyson's 

 plate is not very distinct, but he does not say that it differs 

 from the human. In the Gorilla, according to Duvernoy, 

 it is as in man. 



Rhomboidei. In the Quadrumana generally, these form 

 but one muscle. In the Orang, and in the Inui and Cy- 

 nocephali, (8.) the single muscle is attached to the occiput, 

 thus serving to support the head. 



Levator-anguli-scapulae. Did not differ from the hu- 

 man ; in a Cynocephalus and Macacus it was continuous 

 below with the SerratKS magnns, of wiiich it would thus 

 seem to be merely a continuation. In the Macacus it 

 arose from the transverse processes of all the cervical ver- 

 tebrae, and perhaps from the occiput and first dorsal ver- 

 tebra. 



Levator claviculjE (Tyson), Trachelo-clavicular, or Tra- 

 chelo-acromialis. This muscle is not found in man, but 

 appears to exist under some form in most of the lower ani- 

 mals. In this specimen it was quite strong, but I did not 

 see its origin, which is generally from the transverse pro- 

 cesses of some of the upper cervical vertebra?. 



Serratus magnus. Composed of two fleshy parts, with 

 an intervening thin portion. The superior part seemed to 

 arise from the first and third ribs, thence becoming wider, 

 to be inserted into about an inch of the upper angle and 

 posterior border of the scapula. The inferior portion is 



