114 BULLETIN 57, UNITED STATES NATIONAL MUSEUM. 



Number of forms.— Though two forms of Ccelops have been de- 

 scribed (C. frithii from Bengal and C. bernsteini from Java), only 

 the type species is currently recognized. 



Characters. — Dental formula as in Hipposideros. Lower incisors 

 not forming a continuous row between canines, the outer separated 

 from canine by a space about equal to the width of its crown. Upper 

 molars peculiar in the -narrowness of the inner portion, the unusual 

 development of the styles, and the great depth of the reentrant angles. 

 The angles extend inward almost perpendicularly instead of with a 

 noticeable forward slant. Last upper molar with a distinct, but 

 short, fourth commissure. Skull as in Hipposideros except that nasal 

 swelling is not as conspicuous. Tail rudimentary, less than 2 mm. in 

 length. 



Species examined. — Ccelops frithii Blyth. 



Genus CLCEOTIS Thomas. 



1901. Clmotis Thomas, Ann. and Mag. Nat. Hist., 7th ser., VIII, p. 28, July 

 1901. 



Type-species. — Clostis percivali Thomas. 



Geographic distribution. — British East Africa. , 



Number of forms. — At present the type species only is known. 



Characters. — Dental formula as in Hipposideros. except for ab- 

 sence of small upper premolar (pm 3 ). Teeth not peculiar in form, 

 except that the third upper molar has the first V as large as in the 

 other teeth and the commissure beyond the metacone indicating, as 

 in Ccelops, a rudimentary second V, is larger than in the related 

 genera. This tooth is therefore more developed than in any other 

 known bat. As in Ccelops, which most nearly approaches it, the 

 first V is distinctly smaller than in the other molars. Skull with an- 

 terior portion distinctly less than half as long as brain case and with 

 nasal swelling very inconspicuous. Zygoma slightly expanded at 

 extreme posterior base. Ears very short, appearing as though 

 squarely cut down to a collar-like rim. Tail well developed, longer 

 than femur. 



Remarks. — This genus is strikingly characterized by the slight 

 development of the rostrum and the hhort, squarely cropped ears. 



Species examined. — Clmotis percivali Thomas. 



Genus RHINONYCTERIS Gray. 



1847. BMnonictcris (sic) Gkay, Proc. Zool. Soc. London, p. 16. 

 1866. Rhinonycteris Gkay, Proc. Zool. Soc. London, p. 81. 

 1878. Rhinonycteris Dobson, Catal. Chiropt. Brit. Mus., p. 126. 



Type-species. — Rhinolophvs aurantius Gray. 



Geographic distribution. — Australia. 



Number of forms. — The type species is the only known form. 



