70. DRE: HAPALEMUR SIMUS. 
1870 R. J. E. GRAY ON HAPALE 829 
apical rufous band, and the lower part lead-coloured ; throat whitish ; 
spot on rump at base of tail yellowish. 
Hab. Madagascar. 
This may be Hapalemur olivaceus; but that species is very 
imperfectly described, and it is said to have a different form of the 
hinder part of the lower jaw; but what the difference is, is not 
mentioned, and I do not see any difference in the hinder part of the 
lower jaws of the two species. The front of the jaw in A. griseus 
is very much more slender and weak than in H. simus. 
eG 

Hapalemur simus. 
Fig, 2: 

Hapalemur simus. 
The skull rather solid; nose broad, truncated in front; palate 
slightly concave, nearly as broad before as behind, the teeth-series 
being nearly parallel: cutting-teeth 4; the upper subcylindrical, 
close by the front side of the canine; inner rather the smallest ; 
lower Bpelvate: in two groups, the four inner much compressed : 
canines +.1; upper triangular, conical ; lower rather compressed, 
with a conical lobe on the front edge. 
The animal on which this species is established is full-grown ; but 
