214 



DR. KNUD ANDERSEN ON BATS. 



[Apr. 7, 



very slightly depressed ; profile of skull, therefore, showing an 

 almost straight line from the highest point of the brain-case to 

 the tip of the nasals (text-fig. 42 c) ; height of rostrum at p'^ 

 greater than, or at least equal to, width of skull at " postorbital " 

 constriction (immediately behind postoi-bital processes or their 

 rudiments). In Artibeus the rostrum is considerably more de- 

 pressed and flattened ; the outline in profile, from the front of the 

 sagittal crest to the base of the nasals, steep (text-fig. 43 c) ; the 

 height of the rostrum at p'* considerably less than the width of 

 the postorbital constriction, — Bony palate long : distance from 

 palation to front of incisors very nearly equal to zygomatic width 

 of skull (text-fig. 42 b) ; in Artibeus much less than zygomatic 

 width (text-fig. 43 b). — Median backwardly extending portion of 

 bony palate (behind m^) long, equal to the combined length 

 (externally) of m^ and m^ ; in Artibeus much less than this latter, 

 often only equal to the length of m''. — Anterior nasal opening less 

 oblique, looking chiefly forwards ; in Artibeus noticeably more 

 oblique, looking upwards and forwards. 



Teeth (text-figs. 44 and 47). — Chief characters, as compai'ed 

 with the teeth of Artibeus (see text- figs. 46, on p. 215, and 48, on 

 p. 216) : — outer upper incisors bifid ; cusp 2 in m^ small and more 

 anterior in position ; m^ and mg always present ; m^ situated dii-ect 

 behind (not postero -internally to) m~, and almost as broad as the 

 hinder border of this latter. — The details are these : — 



(1) Cutting-edges both of inner and outer upper incisors bifid 

 (text-fig. 42 D, on p. 213) ; in Artibeus, inner incisors bifid, outer 

 incisors simple (text-fig. 43 d, on p. 213). — (2) The cingulum of 



Text-fig. 44. 



Uroderma hilobatum, $ ad. Para. B.M. 1 



A. Right upper, B. Left lower tooth-row. 



For explanation of lettering of cusps see text, 



the lower canine extends, on the inner side, upwards to (or 

 almost to) the middle of the tooth, often terminating in a small 

 cusp-like projection (text-fig. 47) ; in Artibeus the cingulum ter- 

 minates at about the level of the cutting- edges of the lower incisors, 



