570 Mr. O. Thomas on new 



below yellowish, darkened by the blackish tips to the hairs ; 

 Hit, owing to the specimens being preserved in spirit, an exact 

 determination of the shade is not possible. Membranes 

 uniformly black. Ears slender, their front margin slightly 

 and evenly convex ; tip narrow ; outer margin slightly con- 

 cave below tip, then convex to the base. Tragus with its 

 inner margin straight, its outer margin convex, crenulate, a 

 well-marked lobule at its base. Glands at backs of ears large 

 and prominent. Wings to the base of the outer toe. Tail 

 involved in membrane to its tip. 



Skull, as compared with that of R. tumida, conspicuously 

 larger and heavier in all dimensions. Brain-case more 

 swollen, the frontal profile consequently more convex. 

 Occipital protuberance well marked. 



Teeth as in R. tumida, but larger throughout. Lower 

 incisors of the normal proportions, not as in Boeodon. 



Dimensions of the type (measured on the spirit-speci- 

 men) : — 



Forearm 32 mm. 



Head and body 44 ; tail 29 ; ear 14 ; tragus on inner 

 edge 5 ; third finger, metacarpus 2.9*5, first phalanx 11*8, 

 second phalanx 10"3 ; lower leg and hind foot (c. u.) 18"3. 



Skull : greatest length 14*5 ; basi-sinual length 10*4 ; 

 zygomatic breadth 10 ; interorbital breadth 4*8 ; front of. 

 canine to back of in 6 5*2 ; front of p 4 to back of m 2 3°5. 



Bab. Condoto, Choco, Colombia. Alt. 300'. 



Type. Old male in spirit. B.M. no. 13. 10. 29. 1. Col- 

 lected by Dr. H. G. F. Spurrell. One specimen. 



It will be seen from the above measurements that while the 

 forearm of this bat is not longer than is occasionally found in 

 R. tumida, its skull is decidedly larger in all dimensions. 



Nectomys hammondi, sp. n. 



A glossy brown species related to N. russultts. 



Size rather less than in (he common grey forms of 

 JSectomys, such as A 7 , squamipes, garleppi, and their allies, 

 markedly smaller than in saturatus, larger than in russulus. 

 General colour " tawny olive," strongly lined and darkened 

 with black, the dorsal area markedly darker than the sides. 

 Flanks clearer tawny. Under surface not sharply defined, 

 dull greyish, the bases of the hairs dark slaty, their tips dull 

 whitish slightly tinged with tawny (more strongly tawny in 

 the second specimen). Forearms and metacarpals dark brown, 

 digits paler brown, thinly haired. Hind legs tawny olive ; 

 upper side of feet uniformly greyish brown, the scaling of 

 the skin unusually clearly marked; fifth hind toe, without 

 claw, reaching to the end of the first phalanx of the fourth. 



