52 [May, 1846. 



The Committee to whom was referred a description of a 

 new bat from Western Africa, by Dr. Hallowell, reported in 

 favor of publication. 



Description of a New Species of Bat from Western Africa. 



By Edward Halo well, M. D. 



PTEROPUS Haldemani. 



Description. General expression ferocious; head resembling 

 that of a dog ; ears of moderate size, smooth for the most part, 

 obtuse at the tip, hairy at base externally ; there is no tragus ; body 

 dark brown above; neck, occiput and vertex same color, but 

 lighter than upon the back ; wings and interfemoral membrane 

 of a sienna brown color above and below; thorax and upper 

 part of abdomen and sides brown ; the rest of the abdomen is 

 white; there are two long and thin hairs upon the muzzle; lips 

 full, nostrils prominent, their margins being surrounded by a fold 



of the skin ; eyes rather large, irides ; wings long ; that portion 



of the membrane included between the phalanges naked, the re- 

 mainder more or less hairy above and below ; upper surface of 

 the interfemoral membrane hairy, with the exception of a small 

 part at its posterior extremity which is naked ; under surface also 

 hairy, but much less so than upper ; no tail ; tibia and fibula in- 

 cluded within the membranes; four slender toes, compressed, of 

 nearly equal length, the outer one being a little shorter than the 

 others; they are sparsely furnished with thin hairs, varying in 

 length ; the terminal phalanx of each is provided with a robust, 

 sharp and ineurvated nail. The index finger like the thumb is 

 also furnished with a short and ineurvated nail. 



Measurements. Inches. 



Total length, 3 



Length of head, ..... If 



Distance between anterior margin of nostril and ante- 

 rior canthus of eve, - - - - - I J_ 



10 



Distance between angle of mouth and anterior can- 

 thus of eye, - f 



Length of neck, body and tail, ... 3 



Length of forearm, ..... 3 



Length of tibia, - ... . . - lj 



Spread, 14} 



Length of thumb. | 



