THE CAPUCHINS. 217 
crying, their eyes fill with*tears, but never flow down the 
cheeks. When in pain or terror, the form of the mouth, as 
observed by Mr. Darwin at the Zoological Gardens in London, 
is quite different from that expressing pleasure or satisfaction ; 
and high shrieks are uttered. 
Specimens of this species have been kept in captivity in 
Europe for six and seven years. 
XII, THE THICK-FURRED CAPUCHIN. CEBUS VELLEROSUS. 
Cebus vellerosus, Is. Geoffr., Cat. Méth. Primates, p. 44 (1851, 
part.) ; Gray, Cat. Monkeys Brit. Mus., p. 49 (1870). 
Cebus frontatus, Schl., Mus. Pays Bas, vii, p. 206 (1876, 
part.). 
Characters.—Hairs of crown short; those on the side of the 
dark and narrow crown-spot, produced on the sides into two 
horns or crests. Fur thick and long, mingled with still longer 
glancing hairs; general colour blackish-brown ; top of head, 
nape of neck, and whiskers black. (Grwy.) 
Distribution.— Brazil. 
The following species has been described by Dr. Gray, but 
very little, if anything, is known of its habits or of the exact 
locality in which it lives. 
XIII. THE PALE CAPUCHIN. CEBUS FLAVESCENS. 
Cebus unicolor (nec Spix), Spix, Sim.-et Vespert., Bras., p. 7 
pl. 4 (1823, part). 
Cebus gracilis (nec Spix), Gray, List Mamm. Brit. Mus., p. 
12 (1843). 
Cebus flavescens, Gray, P. Z.S., 1865, p. 827; id. Cat. Mon- 
keys Brit. Mus., p. 51 (1870). 
Characters.—F ur nearly uniform pale yellowish-fulvous ; the 
