204 Mr. 0. Tliomas on 



XL. — On some African Bats and Rodents. 

 By Oldfield Thomas. 



Kerivoula muscilla, sp. ii. 



Size very small. Ears short, laid forward in the spirit- 

 specimen they barely reach to the tip of the muzzle; their 

 breadth equal to their length ; inner margin strongly convex, 

 outer with a well-marked emargination above, convex below. 

 Tragus as in Dobson'a second group, a small basal lobule 

 present, very much as in A". Smithii ; inner margin evenly 

 convex, outer slightly concave. Limbs short, less strikingly 

 delicate than usual ; upper surface of forearms and proximal 

 part of the digits and of hind limbs and feel clothed with fine 

 golden-brown hairs. Wings to the base of tlie toes. Poste- 

 rior edge of interfemoral with a fringe of sliort curved hairs 

 growing from its under surface. Prepuce tufted with long 

 hairs. 



Fur long, brownish grey above and below, so far as can be 

 made out on a spirit-specimen. 



Inner upper incisors slender, practically unicuppid, a 

 rudiment of a secondary cusp present about halfway up the 

 hinder aspect ; outer incisors long, nearly as long as the inner 

 ones, each with a minute external basal secondary cusp. 

 Two small upper and three lower premolars subequal inter se. 

 Dimensions of the type (measured on the spirit-specimen) : — 

 Forearm 27 mm. 



Head and body 37 ; tail 33; head 1-4; ear 10; tragus on 

 inner edge 6 ; third linger, metararpus 26*5, first ])halanx 

 13*5, second phalanx 15; lower leg and hind foot (c. u.) 17 5 ; 

 calcar 16. 



Hah. Ja River, Southern Cameroons. 



Type. Adult male. Collected 22nd December, 1005, by 

 Mr. G. L. Bates. One specimen. 



This little Kerivoula is readily distinguishable from any 

 African s])ecies hitherto described by its small size, the 

 presence of an interfemoral fringe, and its long outer incisors. 

 Dobson's K. a/ricana agrees with it in some respects, but is 

 said to have a tragus as in K. Ilardioickei and ears " longer 

 than the head " *. 



* By ill is expression Dobson appears always to have meant that the 

 ears when laid forward extended beyond tho tip of the muzzle. 



