1907.] 



MAMMALS FROM ANN AM, 



distinctive points. The molars, however, are conspicuously 

 different, and enable this species to be easily diagnosed. In 

 y. cinei'eus the first molar is the largest, and the last or third 

 molar is small and almost quadrilateral in shape. In the present 

 species, however, the second molar is the largest, while the third 

 molai- is triangular in outline and not very much smaller than the 

 first molar. In the lower jaw similar conditions obtain, the three 

 molars are all subequal, the third being slightlj^ the largest, 

 whereas in N. cinereus the last molar in the lower jaw is very 

 markedly smaller than either of the other two. 



Dimensions of type from skin (approx.). Head and body 

 190 mm.; tail 10. 



Text-fifi-. 1. 



Text-fig. 2. 



Text-fig. 1. — Palatal view of skull of Xycticehus pi/gmceiis. 

 Text-fig. 2. — Lateral view of skull of Ni/cticehiis pygmatis. 



Skull. Greatest length 46 mm. ; basal length 38 ; palatal length 

 17*5; zygomatic breadth 27; interorbital breadth 3; greatest 

 breadth of bi-ain-case 25 ; length from palate to lower margin of 

 foramen magnum 17"5 ; breadth of basioccipital at its anterior 

 end 3"7 ; length of molar series 14. 



Hah. Nha-trang, Annam. 



Tyiye. B.M. 6.11.6.2. 6. Collected by ' Dr. Vassal on the 

 13th Nov., 1905. 



The small size and peculiar character of the teeth will prevent 

 this species from being confounded with any others at present 

 known to exist. Only a single specimen (the type) has been sent, 

 which is quite adult but not old. It may be noted that in some 

 respects the teeth tend to approach those in Loris, in which the 

 second upper molar is larger than the first. In the shape of the 

 prfemaxilla also the present species shows a tendency, albeit very 

 slight, to approach Loris by showing its flat surface laterally 

 instead of anteriorly. Externally the blaze between the eyes and 

 its small size are features belonging to Loris, but in the lengtli of 

 its limbs and genei'al build it is a ti'ue NycticebuiS. 



