OKANG OUTANG. 



25 



upon the ribs. The rectus abdominis is proportion- 

 ally broader at its upper extremity than in man, 

 measuring not less than 2.8 at the point of the 

 xiphoid cartilage. Its three transverse tendons do 

 not, as in man, penetrate and divide its internal 

 fibres. In our subject, there existed no pyramida- 

 lis. The external oblique in its origin from the 

 cartilages of the eight inferior ribs, its descending 

 fibres, and its union with its fellow at the linea alba, 

 resembles that muscle in the human subject. The 

 same may be said of the internal oblique. Both of 

 them are extremely thin. The small size of the 

 umbilicus has been already noticed. It is distant 

 from the top of the sternum, 8.4 inches, and 3.3 

 inches from the superior edge of the symphysis pu- 

 bis. We observed a small quantity of fat on the 

 site of the mons veneris. 



The intercostal muscles in both layers, and the 

 muscular heads of the inferior part of the diaphragm, 

 resemble the corresponding parts in man ; but 

 the whole of this organ is larger than in man, on ac- 

 count of the greater extent of the lower part of the 

 thorax in this animal. The psoas niagnus, and 

 psoas parvus, present nothing peculiar. 



The Muscles seen on the posterior view of 

 the Neck and Trunk. — The trapezius and latis- 

 simus dorsi, the rhomboidei, the trachelo mas- 

 toideus, the longissimus dorsi, are situated as 

 in man. The splenii capitis et colli resemble the 

 human in form and insertion ; but when the two 



