Quadetjmana. MAMMALIA. Quadeumana. 
XX 
Jacchus. 
'J'his genus has the conch of the ears large, bald, 
with a tuft of elongated hairs forming an expanded 
tuft on the ear, opening on its front edge. 'I’he hair 
of the sides of the crown elongate. 1’ail annulated 
with black. Back cross banded. Lower cutting- 
teeth elongate, slender, cylindrical, as long as the 
canines. 
MARMOSET [Jacchus vulgaris ] — Plate 3, fig. 9. — 
’J'his elegant little creature is a native of Guiana and 
Brazil. 'Die term Ouistiti is applied to it by some. 
It is characterized by a long and remarkably soft fur, 
varied by strips of brown upon a whitish or yellow 
ground, the outside of thighs and the back having 
gray cross bands, and the head a white spot on upper 
part of the nose, d'he tail is long and bushy, white, 
and encircled by rings of black. Curious radiating 
tufts of white hairs spring from the cheeks, contrasting 
boldly w'ith the dark color of the head, d’he Marmo- 
set is a favorite pet, and, though not as intelligent as 
other species, is susceptible of much cultivation, be- 
coming attached to its keepers, and showing a good 
deal of affection. Its food is both animat and vege- 
table, feeding equally on insects and fruits. The 
length of the full-(>Tow'n Marmoset is about seven or 
eight inches, the tail being twelve inches more. It is 
quite silent generally, but emits at times, when irri- 
tated, a sharp whistle, which gives rise to the term 
Ouistiti. Its habits are much like the Squirrel. Its 
size being so petite, it easily climbs over the limbs of 
trees and secures its favorite food, the eggs of birds. 
This is the Simia jacchus of Linnoeus, Ouistiti of 
Buffon, Hapale jacchus of Illiger. A variety has 
ear-tufts white, and head black. Another, J. albicollis 
of Spix, has ear-tufts white, hiiuler part of the head, 
and back of neck, gray. A third, J. penicillatus of 
Geoff and Spix, has ear-tufts black, and head and neck 
black. A fourth variety, J. leucocephalus of Geoffroy, 
has black ear-tufts, blackish head and neck, and whit- 
ish forehead, temples and face. A fifth, J. leucogenys, 
has face, cheeks and throat, paler gray-brown than 
the fourth variety, but is otherwise the same. A 
sixth variety is like the third, with no wdiite spot on 
the nose. Gray records a note as follows : “ See 
Jacchus chrysopygus, Natterer — Mil~an, Bel. Flor. 
et Fauna — black ; rump and inner sides of thighs, 
golden ; forehead, lurid yellow ; mane descending 
below the humerus ; inhabits Brazil.” 
CtmUELLA. 
'I'his genus is characterized by having small, short 
and, externally, slightly hairy ears, hidden in the 
elongated reversed hair of the crown. It has no ear- 
tufts. ’J’he tail is dark-ringed. Back punctulated. 
The lower incisors are elongate, cylindrical, and as 
long as the canines. 
THE PIGMY HAPALE [Celuella joyymea).— This 
is ferruginous, yellow in color, with black and red, 
varied. The neck, chest, belly, and inside of thighs 
and arms, yellowish. Hands and feet are yellow- 
brown. It is the H. pygmea of Spix and Geoffroy. 
Mico. 
In this genus there are no annulations to the tail. 
The tail is black. 'J’he ears are large, exposed, and 
naked externally, and internally they have no pencil 
of hairs. 
THE BLACK-TAILED MARMOSET [Mico melanurus). 
This is a rare form. Mr. Sclater gives a fine figure 
and description, in Froc. Zoo. Soc. Land., for 1875. 
It resembles somewhat the argentatus, and shows a 
nearly uniform silvery coat, whitest on the head and 
cheeks and on the upper surface of the toes. It has 
a black tail, sharply defined in color at its base. 
'J'his is Jacchus melanurus of Geoff, and 11. melanura 
of Wagner and Schreb. An albino variety is known ; 
the tail, however, is black. Mico is a term used by 
Buffon; Simia argentata is Linnaeus’ name; Fair 
Monkey is Pennant’s, and Pennant calls it Cebus 
canus. Bolivia is given as its habitat. 
Leontopithecus. 
'riiis genus has head covered with elongate hairs, 
those round the face bent backwards. The face is 
rather naked ; the ears being bald and partly hidden. 
'I'he tail is not ringed. 'J’he lower cutting-teeth are 
short, and truncated. The canines are conical. 
MARIKINA [Leontopithecus rosalia ). — 'J'his ex- 
quisite little form is also called the Silky Monkey. 
Its graceful shape and extremely beautiful fur make 
it an attractive pet. 'J’he peculiar disposition of the 
fur around its neck has given it the trivial name of 
Lion Monkey ; its size and habits, however, will hardly 
sustain such relations to the king of beasts. A rich 
golden sheen is the characteristic of its coat, its hairs 
having the appearance of the raw silk as it is unwound 
from the cocoon of the silk worm. 'I’he color is nearly 
uniform, the paws being somewhat darker. 'I'he 
Marikina is very cleanly, dressing its fur with extreme 
care. It is extremely timid, showing no disposition 
to resent injury, but escaping with the greatest 
agility when threatened by foes. Its voice is a sharp 
hiss, but it is seldom vented. Its body is about eight 
inches in length, the tail about twelve inches. 
'I’he Marikina is a golden yellow, with more or less 
red. A variety has head, feet, hands and end of tail, 
blackish. It is the Marikina of Buffon. Simia 
rosalia of Linnceus, and Midas rosalia of Geoff. Hab- 
itat Brazil. 
BLACK AND GOLD MARMOSET [L. chrysomelas).— 
As the generic name imports, these creatures are 
called Lion Monkeys, the specific name indicating 
the black and golden hues. 'J'he fur is exceed- 
ingly rich in color, and fine in texture. 'I’he circum- 
ference of the face, the fore-arms, hands and base of 
tail are golden fulvous, the rest black. 'J’his is the 
Hapale chrysomelas of Prince Maximilian ; several 
specimens of his own collecting now belong to the 
cabinets of the American Museum, Central Park, N.V. 
ffinipos. 
In this genus, the face and sides of the head are 
rather naked. 'I'he crown has a patch of hair which 
