1893-] Allen and Chapman on Trinidad Mammals. 209 



Total length, 1060 mm. ; head and body, 610 ; tail vertebrae, 

 450 ; hind foot, 103 ; ear from crown, 20. Skull : basal length, 1 

 98 ; interorbital breadth, 19.5 ; Pm.4, 9. These cranial measure- 

 ments somewhat exceed those given by Mr. Thomas (1. c.) for 

 two specimens of L. felina. In the absence of proper material 

 for comparison we provisionally adopt the name above given. 



The Otter is apparently a rare animal in Trinidad. Hunters 

 were either ignorant of its presence or said that they had met 

 with it on very few occasions. 



10. Sciurus aestuans hoffmanni Peters. A series of ten 

 specimens prove to be much nearer subspecies hoffmanni from 

 Costa Rica, both in size and coloration, than to the true astuans 

 of Brazil, although clearly intermediate between the two, as 

 respects both size and coloration. 



The measurements of this series are as follows : Total length, 

 371 (348-390) mm. ; head and body, 197 (182-208) ; tail verte- 

 brae, 174 (145-208) ; hind foot, 47 (43-52); ear, 19. The skulls 

 of six specimens average 50 mm. in total length and 28.7 in 

 greatest zygomatic breadth, as against respectively 53 and 31 in 

 three skulls of hoffmanni from Costa Rica. The coloration is 

 much nearer that of hoffmanni than it is to Santarem and Cha- 

 pada examples of astuans. 



This species is very common. It lives in the forests, particu- 

 larly in those which are bordered by cacao groves, to the fruit of 

 which they do much damage. Its voice bears an unmistakable 

 resemblance to that of Sciurus hudsonius, but its vocabulary is 

 more limited, and it is far less noisy than that species. 



Nectomys palmipes, sp. nov. 



Similar in general external and cranial features to N. apicalis Peters, but 

 much smaller and darker, with a relatively much shorter tail. 



Adult. Pelage soft, full, glossy. General color above pale yellowish brown ; 

 the middle of the dorsal region, from the nose to the tail, strongly blackish ; 

 the sides grayish buffy brown, sparingly varied with black-tipped hairs ; the top 

 of the head, from the muzzle to behind the eyes, blackish varied with gray. 

 Below, whitish with a wash of pale buff, strongest over the middle of the 



1 These measurements are in conformity with those given by Mr. Oldfield Thomas, P. Z. S., 

 1889, p. 200. 



{September, 1893.} IJf 



