TEE MONK MONKEY . 
193 
On the outer surface of the brain there are a few but deeply-cut and characteristic furrows. The 
fissure of Sylvius slopes backwards and upwards, but not very far back, and ends abruptly. On the 
front lobe there is a deeply-marked fissure, running crossways, backwards, and outwards, and bent 
in the middle. Separated from this by a wide interval is the fissure of Rolando. The external 
perpendicular fissure so common in the Old World Monkeys is just visible. On the inner surface the 
sulci are present in a simple form, and the calcarine sulcus is well curved, and prolonged and bifurcated. 
This is a better organised brain than that of the Howler, and is not unlike that of the Spider Monkey. 
THE monk. (From the Proceedings c J the Zoological Society.) 
The second series of the Sakis, or those with only a short tail, or a stump of three inches in length, 
are called Bracliyures, from this peculiarity. 
THE SCARLET-FACED, OR WHITE-SKINNED SAKI. THE TJAKARI, AND THE BALD-HEADED 
BRACHYURE, OR SAKI.* 
These are the names of a rare Monkey, which Bates described as follows : — “ Early one sunny 
morning, in the year 1855, I saw in the streets of Ega a number of Indians, carrying on their shoulders 
down to the port, to be embarked on the Upper Amazon steamer, a large cage, made of strong lianas, 
some twelve feet in length and five in height, containing a dozen Monkeys of the most grotesque 
appearance. Their bodies (about eighteen inches in height, exclusive of limbs) were clothed from neck 
to tail with very long, straight, and shining whitish hair. Their heads were nearly bald, owing to the 
very short crop of thin grey hairs, and their faces glowed with the most vivid scarlet hue. As a finish 
to their striking physiognomy, they had bushy whiskers of a sandy colour, meeting under the chin, and 
# Pithecia, or Brachyurus calms. 
