ORANG OUTANG, 



bulum, and is inserted just below the fore-part of 

 the great trochanter, between the head of the cru- 

 ralis and vastus externus, a little below the origin 

 of the former. It is thin and fleshy through its 

 whole extent, except where it is inserted by a very 

 short-flattened tendon. At its upper part, it is 

 united by cellular substance to the iliacus interims. 

 The action of this muscle, which appears to be pe- 

 culiar to this animal, is to draw the thigh up toward 

 the body ; and it seems especially to be intended 

 to assist in climbing. On this account we propose 

 to name it the scandens, or Musculus scansorius; 

 and we are disposed to regard it as one of the 

 principal peculiarities in the Simia Satyrus. Whe- 

 ther it exists in any of the other simise, we are un- 

 able to decide, but we did not observe it in the Si- 

 mia Maimon ; see fig. G, where a gives a posterior 

 view of this muscle. The obturator interims is mucji 

 more fleshy than in man, lining the whole internal 

 surface of the pubis and ischium. The portion which 

 becomes external, is more pyramidal, its tendon is 

 broader, and it has a few fleshy fibres almost to its 

 insertion at the root of the great trochanter. The 

 pyriformis is a strong fleshy muscle as in man. The 

 gemini, the quadratus femoris, the coccygeus and 

 levator ani, are similar to the human, and the ob- 

 turator externus is larger considerably, as might 

 be expected from the form of the pubis. The pec- 

 tinalis is less distinctly marked ; the rectus fe- 



