THE TITI MONKEYS. 165 
X. THE BLACK-HANDED TITI. CALLITHRIX MELANOCHIR. 
Callithrix melanochir, Neuwied, Beitr., i1., p. 114, et Abbild., 
iv.; Gray, Cat. Monkeys Brit. Mus., p. 57 (1870) ; Schl., 
Mus. Pays Bas, vii., p. 233 (1876). 
Characters.—General colour red, but the crown of the head, 
the throat, and inner side of the limbs, mixed black and grey ; 
the hands and feet black. 
Distribution This species has been recorded from Bahia, on 
the east coast of Brazil. 
XI. THE GREY TITI. CALLITHRIX GIGOT. 
Gaiiiirix- gicol, Spix, Sim. et. Vespert.. Bras.; p. 22, pl. “16 
(1823) ; Schl., Mus. Pays Bas, vii, p. 234 (1876) ; Wel- 
don, bs :Z.-S.,. 12884, 5. G, 
Callithrix gigo, Gray, Cat. Monkeys Brit. Mus., p. 57 (1870). 
Characters.—Hair about two inches long, soft and slightly 
woolly over the trunk ; hair on the forehead shorter and more 
thickly set ; that over the limbs short and loose. General 
colour of the back reddish-grey behind, more ashy over the 
forehead and limbs; the hair black at the base, cream-coloured 
further up, the tips ringed with chestnut and black. Muzzle 
and chin black, with a few short, strong, white hairs ; a black 
line along the nose and round the eyes; the eyelids white ; 
the eye-lashes and long eye-brows black; forehead thickly 
covered with loose grey hairs, slightly tipped with black; a 
faint ridge across the brow between the ears; the ears black, 
covered with soft black hairs, except for a small grey tuft 
at their hind outer angle. In front of the ears a light grey 
band over the cheeks, continued above on to the forehead, 
below to the chest; throat naked, light pink; under surface 
