320 



PROCEEDINGS OF THE ACADEMY OF 



[1898. 



is narrower in proportion to its length. The skull is smaller and the 

 teeth, especially in the lower jaw, are comparatively slender and 

 weak. 



TABLE OF MEASUREMENTS OF TWO FORMS OF HIPPOSIDEROS LARVATUS. 



Megaderma spasma (Linnaeus). 



An adult male in formalin and one skin. The latter is an adult 

 female taken on March 28, 1896. On the lahel of this specimen Dr. 

 Abbott has written : " Uterus contained a fetus about two inches in 

 length and hairless. Discoidal placenta about f inch in diameter." 



While this bat is clearly not related to Megaderma lyra, I am not 

 satisfied that it is the M. spasma of Dobson and Blanford. From 

 the descriptions of the latter species it differs in the following char- 

 acters : skull with small but evident postorbital processes (more pro- 

 nounced than in Dobson's figure of M. lyra) ; mesopterygoid fossa 

 divided by a central longitudinal ridge in its anterior half only ; 

 first upper premolar very small and partly hidden by cingulum of 

 second premolar which is almost, or quite, in contact with canine ; 

 inner basal cusp of upper canine indistinct ; middle lower incisors 

 trifid ; posterior branch of tragus apparently longer ; free upper part 

 of nose leaf with very strongly convex sides and a deep constriction 

 at base; heart shaped supplemental leaf above nostrils barely reach- 

 ing edge of principal leaf. 



Measurements : head and body, $ , 77 ; head, $ , 28 ; tibia, $ , 32, 

 9, 32; foot, S, 16,9, 15; calcar, $ 13.4,9 , 11; forearm, S , 57 ; 



