CLASS I. MAMMALIA: ORDER 2. QUADRUMANA. 109 
THE MONK SAKI : P. M0NACHU8. — (See p. 110.) 
The Bellowing Monkey, N. vociferans^ is found on the borders of tlie Paraguay and iti 
Brazil. Like tlie douroucouli, with which it is often confounded, it has a cry at night resembling 
that of the jaguar, and hence has been called the Mona-tiger and Titi-tiger. Travelers are fre- 
quently put in a state of trepidation by the cries of these innocent little creatures. 
SATANIC SAKI. — (See p. 110.) 
Tlie A^. Oseryi inhabits the borders of the Upper Amazon and Peru : the N. lemurinus is found 
in the mountainous parts of New Grenada. They live in small families, sleeping in nests of leaves 
by day, and going forth only at night for food. They utter a frequent cry of douroucou, which 
has doubtless given rise to the name of one of the species, the douroucouli. The Vitoe, or N . 
felmus, is found in Bolivia and Brazil. 
Gemis SAKI, Pithecia. — The monkeys of this genus are marked by a short head, an angular 
muzzle, and a non-prehensile tail. They are gentle, intelligent, slender of form, and partially noc- 
