NEW YORK ZOOLOGICAL PARK. 87 
Of the many African monkeys, some of the most showy 
(such as the Guerzas and Colobos) are so difficult to procure 
they can not be set forth as permanent residents in the 
Primate House. The following species, however, may be 
classed with the reliables: 
The White-Collared Mangabey and Sooty Mangabey are 
both so lively, so good-natured, and so free from the fight- 
ing habit, they are prime favorites with everybody. 
The Mona Monkey is handsome and easily kept, and an 
excellent representative of the great African genus Cerco- 
pithecus. 
The Green Monkey and the Vervet are lively but quarrel- 
some, and at times become dangerous. The Patas, or Red 
Monkey, is very sedate, and makes a good cage-mate for the 
mona. 
The New World Monkeys, even at their best, never make 
a strong showing in a vivarium. The trouble is that many 
of the most interesting species are so delicate it is impossible 
to keep them alive in captivity. Fame awaits the man who 
can discover a bill of fare on which Howling Monkeys, Sakis 
and Yarkees can live in captivity to old age, and repay their 
cost and care. Their digestive organs are delicate, and are 
subject to derangement from causes so slight they can not 
be reckoned with. 
The Sapajous are the hardiest, the most intelligent and 
in some respects the most interesting of the New World 
monkeys. They all possess the prehensile (or grasping) 
tail, which is not found on any Old World monkey, and the 
use made of it is a constant source of wonder. Monkeys of 
this species are quite common in captivity, and their 
wrinkled brows and serious countenances give them an ap- 
pearance of being burdened with cares,—which most cap- 
tive monkeys certainly are! These are the unfortunate 
creatures which so often come to grief on hand-organs. 
The Black Spider Monkey and the Gray Spider Monkey 
represent a genus of animals quite as attenuated in form 
as the gibbons. Their slender bodies, exceedingly long and 
slender legs and tail,—the latter strongly prehensile, and 
better than a fifth arm and hand,—give them when in the 
tree-tops an appearance truly spider-like. They are agile 
climbers, but not rapid runners, and having no means of 
defense are very timid. Their stomachs are so simple they 
seem to lack some element or function that is necessary to 
