148 SCIUROPTERUS PLATYüRUS. 



from Sc. pearsonü , Sc. hageni and other large Sciuropterus- 



species. 



Description of the type , an adult female : 

 Hairs of back and upperparts of wing-membranes very 

 short, soft; they are of a black colour and tipped with 

 chestnut, lighter on the wing-membranes; upperparts of 

 extremities with throughout black hairs or the black hairs 

 have light chestnut tips or , like on the forelegs , the hairs 

 are tipped with white. The hairs of chin , chest and under- 

 side of forelegs are pure white , those of the belly and 

 underside of hindlegs black with white tips. The tail has 

 uniformly colored light brown hairs. 



The tail is distichous on its upper- as well as on its 

 underside and very flat; the form of the tail is quite dif- 

 ferent from what we know of other /SaWop^m ; its is broad 

 in its basal half and diminishes in broadness towards its 

 end, where it attains hardly half the dimension of the 

 basal part. The tail of Sciuropterus sagitta remembers the 

 tail of our species in a distant way. 

 Dimensions in millimetres: 



head and body 1^^ 



tail with tuft 1^^ 



ear 1^ X ^ 



hind foot with claws 25 



length of skull ^^ 



greatest breadth of skull 20 



nasals 



6 5 

 diastema 



molar series (upper jaw) 



The differences in the skull between our species and the 

 other small Sciuropteri will be evident by a comparative 

 study of the figures of their skulls on plate 7. 



The incisors are hght yellow colored. 



Whiskers not numerous, black, less long than in other 

 species as they measure only 37 mm. No bristles on the 

 cheeks or on other parts of the head. 



Notes from the Leyden Museum, Vol. XII. 



