NATURAL SCIENCES OF PHILADELPHIA. 319 



of the muzzle, they are situate much nearer to the ears than to the 

 nose, and rather above a line connecting the two. The ears, 

 similarly, are large and "leafy," appearing the more prominently 

 because they rest upon the most protuberant part of the skull. 

 When pressed out flat, the auricle is nearly orbicular. In the 

 natural state, the fore border is largely folded over, the duplica- 

 tion extending from the extreme root to the highest point of the 

 ear, and representing about one-third of the width of the ear. This 

 fold causes a slight pointing of the ear. The posterior border is 

 more rounded than the anterior ; and within its base is developed 

 a large conspicuous obtusely angular antitragus, so broad that its 

 inner edge is extensively overlapped by the fold of the anterior 

 border of the auricle. A fringe of long hairs springing from the 

 base of the anterior fold is directed backwards over the antitragus : 

 otherwise the auricle is closely and completely pilous on both 

 sides, the hairy clothing of the open part of the concavity being 

 heavier than that on the back of the ear. 



The fore limbs are shortened, in sacrifice of locomotive ability 

 to increase of prehensile facult}'. The arm and forearm are stout ; 

 the latter tapers very abruptly and contracts to a delicate wrist 

 and very small hand. There are four perfect digits, and a rudi- 

 mentary thumb ; the longer digits rather exceed, even excluding 

 their claws, the length of the hand proper (metacarpus) ; the 3d 

 and 4th are approximately equal in length and longest ; the 2d 

 and 5th are successively reduced a little in length ; the 1st is a 

 mere stump; its claw a knob; the other claws are well formed, 

 slender, compressed, acute, little curved, nearly as long as their 

 respective digits. The back of the whole hand is pilous, and 

 longer hairs fringe the sides of the digits ; but the palm is naked, 

 minutely tubercular throughout, these numberless little elevations 

 showing no recognizable special distribution. The hand ends 

 behind with an enormous smooth bulb, a little to the inner side, 

 and with a smaller external bulb, likewise smooth, separated from 

 the main one by a hairy isthmus. 



The hinder limbs offer the opposite degree of development- 

 While the fore, from the elbow outward, is only a fourth of the 

 total length, the corresponding measurement of the hind limb, 

 that is, from the knee outward, is three-fifths or more of the whole 

 length, and the hind foot alone is about one-third of such dimen- 

 sion. There is no noticeable bulkiness of the haunches, but the 



