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1862.] MR. R. SWINHOE ON THE MAMMALS OF FoRMOSA. 347 
3. Description or A New Species or Lemur. 
By A. D. Barrett. 
(Plate XLI.) 
In size this animal nearly equals the Ruffed Lemur (Lemur ma- 
eaco), which animal it also much resembles in form and habits. 
The living specimen now exhibited was purchased for the Society 
from a dealer in Liverpool, in the month of October 1861, and has 
been in the Menagerie since that time. It was stated, by the person 
who brought it to this country, that the natives of Madagascar, from 
whom it was obtained, said it was of a very rare kind, and that it 
had been kept as a pet upwards of two years in that country. 
I have compared this animal with the descriptions and specimens 
that I have been able to find in the British Museum and several 
other museums on the Continent, and I feel satisfied that this animal 
is specifically distinct from any that I have met with. I therefore 
propose to call it the White-whiskered Lemur (Lemur leucomystax)— 
a name that will, I think, enable any one to recognize the species, it 
being remarkable for its long and perfectly white whiskers, in which 
its ears are almost entirely concealed; the face is greyish black, 
darkest on the nose and back part of the head; the feet are brown, 
inclining to biack on the toes. The prevailing colour of the body, 
limbs, and tail is reddish brown on a grey ground, darkest on the 
middle of the back ; on the lower part of the back, at the base of the 
tail, is a white patch ; the tail is lighter in colour than the body, the ° 
underside and tip nearly white ; the belly is greyish white; the eyes 
are yellow-brown. On examination, I find the animal is a female ; 
and I imagine, from her voice, which is a kind of hoarse croaking 
bark rapidly and frequently repeated, that the male would probably 
produce a louder and more powerful note. 
I am led to infer this from having repeatedly heard the voice of 
both male and female of LZ. macaco. The voice of the male of this spe- 
cies is certainly very astonishingly powerful, and can be heard a great 
distance ; while the voice of the female, although loud and discordant, 
is comparatively weak. Nevertheless it is a very unpleasant series 
of loud, grunting, grating barks, sufficient to alarm a nervous traveller 
should he be in the forest at dark and unacquainted with the size 
and nature of the animal producing these loud and dismal sounds. 
4. On tHe Mammats or THE Istanp or Formosa (CuINA). 
By R. Swinuor, Esa., F.R.S., H.M. Vicre-consun at 
Formosa. 
(Plates XLII., XLIII., XLIV., XLV.) 
The island of Formosa lies almost due north and south, off the 
coast of China, in length about 120 miles, and varying in breadth 
from 20 to 80 miles, its nearest point to the adjacent mainland being 
