MAMMALIA. 



Family— PHYLLOSTOMIM:. 



Desmodus D'Oebignyi. 



Plate I. Natural size. Skull, teeth, &c. PI. XXXV., figs. 1. 



D. pilis nitidis adpressis ; corpore supra fusco, pilis ad basin albis ; guld abdomineque 

 cinerescenti-albis ; nasus prosthemate parvulo bifido. 



Description. — The fur of this Bat is glossy and has a silk-like appearance ; that 

 on the top of the head, sides of the face, and the whole of the upper parts of 

 the body, is of a deep brown colour ; all the hairs on these parts, however, 

 are white at the base. The flanks, interfemoral membrane, and the arms, are 

 also covered on their upper side with brown hairs. On the lower part of the 

 sides of the face, and the whole of the under parts of the body, the hairs are 

 of an ashy-white colour. The membrane of the wing is brownish. The 

 ears are of moderate size, and somewhat pointed ; externally they are 

 covered with minute brown hairs, and internally with white. The tragus is 

 also covered with white hairs ; it is of a narrow form, pointed at the tip, 

 and has a small acute process in the middle of the outer margin. The nose- 

 leaf is pierced by the nostrils, which diverge posteriorly, and is so deeply 

 cleft on its hinder margin, that it may be compared to two small leaflets 

 joined side by side near their bases. These leaflets, unlike the nose-leaf 

 of the Phyllostomina, lie horizontally on the nose to which they are attached 

 throughout, a slight ridge only indicating their margin. Around the pos- 

 terior part of the nose-leaf there is a considerable naked space, in which 

 two small hollows are observable, situated one on each side, and close to the 



B 



