THE FAT-TAILED LEMURS. 63 



and thicker proportionately than in Chirogale milii ; under 

 surface and inner side of limbs fulvous. 



Distribution. This species, according to M. Grandidier, to 

 whom all our knowledge of it is due, has been obtained on the 

 River Tsidsibon, but is reported from other places on the 

 west coast of Madagascar. 



ii. THOMAS' FAT-TAILED LEMUR. OPOLEMUR THOMASI. 

 Opolemur thotnasi, Forsyth Major, Nov. Zool., vol. i., p. 20, 

 Taf. i., fig. i Taf., ii., figs. 2 and n (1894). 



Characters. Nearly allied to O. samati. Head broad, flat ; 

 snout short ; ears short. Above grey, with a wash of rusty 

 brown, the tips of the hair glistening silvery-grey ; top of head 

 somewhat darker ; under side of tail lighter ; a white band be- 

 tween the eyes extending down to the nose-pad, which is 

 naked ; round the neck a white ring broken by a grey spot ; 

 ring round the eyes, and hair of ears, brownish-black ; cheeks, 

 lips, chin, throat, breast, belly, inner side of limbs, upper side 

 of hands and feet, yellowish-white, and inclining to greyish- 

 white, where it merges into the upper side. Length, 9^ inches ; 

 tail, 8 inches. 



Skull depressed ; brain-case flat and short ; facial portion 

 blunt ; inter-parietal bone broad and short. Posterior upper 

 pre-molar broader than the median, and broader than the same 

 tooth in O. samati) the median pre-molar lacking the inner 

 cusp. Nasal bones sharply keeled in the mid-line. 



Distribution. Of this species only the three specimens, in the 

 British Museum, are yet known. They were obtained near 

 Fort Dauphin, on the south-east coast of Madagascar. 



Habits. Nothing is known of the habits of either of these 

 two species of Opolemur, 



