

310 Mr. 0. Thomas on 



Capt. Hutton, has undergone certain vicissitudes which have 

 affected the condition o£ the skull. No cranial characters can 

 therefore be described, and even the teeth appear to be a little 

 distorted and shrunk ; but this can in no way affect the 

 distinguishing marks on which the genus is based. 



XXXVI. — A new Genus of Phyllostome Bats and a neio 

 Rhipidomys//Y>m Ecuador. By Oldfield Thomas. 



(Published by permission of the Trustees of the British Museum.) 



AMONG a small collection of mammals from Baeza, Oriente of 

 Ecuador, presented to the National Museum by Mr. Walter 

 Goodfellow, there occurs, besides such rarities as Artibeus 

 glaucus, Diphylla ecaudata, Nasua judex, and Oryzomys 

 balneator, an example representing a new genus and species 

 allied to the common Sturnira lilium of the same region. 

 It may be described as follows : — 



CORVIRA, gen. nov. 



General characters as in Sturnira, but only two lower 

 incisors present. 



External structure apparently quite as in Sturnira, though 

 the nose-leaf and ear may show some differences when spirit- 

 specimens are examined. Interfemoral membrane similarly 

 reduced. No glandular shoulder-tufts perceptible. 



Skull of the general shape of that of Sturnira, but the 

 muzzle and interorbital region rather narrower. Angular 

 process of mandible shorter. 



Teeth of the same non-cuspidate character as those of 

 Sturnira. Upper incisors more disproportionate than in that 

 genus, the outer ones smaller and narrower, the inner pair 

 longer and slenderer, with a small supplementary basal cusp 

 postero-externally ; breadth of the whole incisor-row much 

 less than in Sturnira, not equalling the length of the canine. 

 Premolars and molars all slightly separated from each other ; 

 the premolars evenly oval transversely, their breadth about 

 three-fourths that in Sturnira, while their antero-posterior 

 diameter is only about half. M 1 subtriangular, with rounded 

 angles, more carnassial-shaped than in Sturnira ; other molars 

 about as in Sturnira. Throughout the series all cusps are 



