THE FAT-TAILED LEMURS. 63 
and thicker proportionately than in Chirogale milit ; 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 thomasi, Forsyth Major, Nov. Zool., vol. 1, p. 20, 
Taf,.1., fig. ©. Vat, 11., figs. 2.and-1r (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, 914 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. 
