34 DESCRIPTION OP THE SKELETON. 



The posterior superior edge, which corresponds with the base of the 

 scapula in • man, is thick and rough inferiorly ; then becomes thinner ; and 

 terminates in the very thick massive superior angle, which does not, however, 

 correspond precisely with the same angle in the human bone. The whole 

 of this edge, with seven inches of the angle, is in a state of epiphysis. 



The scapula is very thin in the anterior and posterior spinate fossae 

 near the spine. The summit, or superior part, of the spinous process, the 

 glenoid cavity, and the posterior angle, are massive. The length of the base 

 is thirty-six inches ; of the anterior edge, thirty-three ; and of the posterior, 

 thirty, including the glenoid cavity. The circumference of the neck above 

 the glenoid cavity is twenty-six inches. 

 os Os Humeri (Plate XXY.). — The os humeri is massive; its superior 



Humeri. 



extremity exhibits the articulating head and two tuberosities. The articu- 

 lating surface is small compared to the human, and forms a small part of 

 a globe. Where this surface is united to the tuberosities, there is an inden- 

 tation or groove. The articulating surface is thirteen inches in length, 

 and is surrounded by a ridge of moderate elevation. The great tuberosity 

 is eighteen inches long, following its curve, and very rough on the outside 

 for muscular attachments. The small tuberosity is cuneiform ; it is four 

 inches broad at its base, and terminates in a sharp ridge. The groove for 

 the biceps tendon, between these tuberosities, is large enough to receive a 

 man's arm. Below the great tuberosity on the outside is a remarkable 

 projection extending two-thirds clown the limb, very rough for the attach- 

 ment of the deltoid muscle. The external condyle is prominent and rough, 

 of great thickness. The internal condyle is broader, but less prominent, 

 than the external ; its internal surface is very extensive and rough for 

 muscular attachments ; externally and posteriorly, it presents a surface, 



