&28 DR. J. E. GRAY ON HAPALEMUR SIMUS, [Dec. 6, 
Carnivorous Mamm. Brit. Mus. p. 177; De Blainville, Ostéogr. 
Viverra, tab. viii. (skull), xi., xii. (other bones). 
Falanaka, Gray, Ann. & Mag, Nat. Hist. 1870, vol. vi. p. 424. 
Length of body and head 22 inches, tail 103 inches, =323 inches. 
Hab. Madagascar. 
6. Notes on Hapalemur simus, a new Species lately living 
in the Gardens of the Society. By Dr. J. E. Gray, 
F.B.S. &e. 
(Plate LIL.) 
Every day, as the osteology of the species is more studied, brings 
to our knowledge the fact that Mammalia which are so alike in 
external appearance as not to be distinguishable, prove on the 
examination of the bones, and especially of the skulls, ta belong to 
very distinct species ; and some even, as in the leaf-nosed Bats and 
American Tapirs, prove to be very distinct genera. The animal I 
am about to bring before the Society is an example of this kind 
among the Lemuride. 
Mr. Bartlett during the autumn brought to the British Museum a 
Lemur which had died in the Society’s Gardens to be determined, 
that its name might be entered in the list of recent accessions ; and I 
agreed to purchase it for the collection. On the casual inspection of 
the animal in its dead state I believed it to be a large specimen of 
Hapalemur griseus. The preserved specimen and skull were exhi- 
bited on November the Ist. On examining the animal before it was 
placed in the public room of the British-Museum collection, I was 
convinced that it was of a very distinct species from Hapalemur gri- 
seus, then in the Museum, and | have therefore sent to the Society 
the following notes showing the distinctions of the two species. 
I. Nose tapering, narrow in front. Skull—nose tapering, narrow in 
front; palate dilated behind ; series of grinders converging in 
front ; lower jaw broad and strong in front, with a long 
symphysis. LAPALEMUR. 
HAPALEMUR GRISEUS. B.M. 
Hapalemur griseus, Sclater, Proce. Zool. Soc. 1863, p. 181; 
Mivart, Proc. Zool. Soc. 1864, p. 613, fig., skull (copied, Catal. 
Monkeys Xe. in B. M. p. 77). 
Il. Nose broad and truncated. Skull—nose very broad, square, 
truncated in front ; palate scarcely wider behind ; series of 
grinders wide apart and nearly parallel ; lower jaw weak 
and narrow in front, with a short symphysis. PROLEMUR. 
HApALEMUR SIMUS, sp. nov. (Plate LII.) B.M. 
Back iron-grey, with a rufous tinge; the hairs black, with a sub- 

