Four neio Small iMammals from Venezuela, 411 



palato-sinual lengtli 3"8 ; front of canine to back of in^ -l'? ; 

 combined length of m' and ni- on outer edge 2'4. 



Jrlab. Altagraeia, Lower Orinco, Venezuela. 



Ti/pe. Adnlt male. B.M. no. 98. 5. 8. 4. Original 

 nundjer 9662. Collected 12tli January, 1898, by Mr. G. K. 

 Cherrie. 



Specimens of tliis species from the Orinoco and Oayenne 

 liad iiitlierto been referred to S. canescens, but the arrival of 

 a skull of the same form from near Lake Valencia, Carabobo, 

 collected by ilr. S. M. Klages, has drawn my attention to 

 its very much larger molars, on which account it should 

 apparently be se|)arated sj)ecifically. The type of S. canes- 

 cens has also a well-marked basisphenoid septum, none being 

 present in any of the four examples of S, pumila. 



Vampyrops oratus, sp. n. 



Near V. dorsalis and umhratus but smaller and the lower 

 molars broader. 



External characters about as in V. cZorsaZi.*, except that the 

 colour is more smoky and the facial lines are distinctly 

 marked, pale brownish white, the dorsal line well-defined, 

 white. 



Skull rather smaller than that of dorsalis, the palate 

 shorter and the posterior palatal tube not continued quite so 

 far back. 



Incisors proportionally rather small, though much larger 

 than in V. zarhiniis and reeifinus, the enamel-covered part of 

 V- 1*4 X 0*6 mm. Upper cheek-teeth about as in dorsalis, the 

 posterior premolar with secondary cusps on the hinder edge 

 of the main cusp. The anterior molars distinguished^'rom 

 those of all other members of the genus by the unusual 

 development of their inner ledges, which project inwards 

 considerably beyond the level of the cusps, and make the 

 middle breadth of each tooth considerably greater than the 

 posterior breadth, these two breadths being approximately 

 equal in other species. 



Dimensions of the type (the italicised measurements taken 

 in the flesh) : — 



Forearm 47 mm. 



IJead and body 12 ; ear 15; third finger, metacarpus 43; 

 first phalanx 17*5, second phalanx 24; lower leg and hind 

 foot (c. u.) 30. 



Skull : greatest length 26*3, basal length 21*4 ; zygo- 

 matic breadth 15; interorbital breadth 6*7; mastoid breadth 



28* 



