Miocella sericeus, Gray, Cat. Monkeys Brit. Mus. App., p. 131 (1870).

Hapale chrysoleuca, Schl., Mus. Pays Bas, vii., p. 227 (1876).

Characters.—Ears large, naked, exposed, margined with long white hairs. General colour white; limbs, under surface, and tail, uniform greyish-yellow, or reddish-brown in some varieties.

Distribution.—Forests of Brazil; vicinity of Borba, on the Rio Madeira.

VI. THE PIGMY MARMOSET. HAPALE PYGMÆA.

Jacchus pygmæus, Spix, Sim. et Vespert. Bras., pl. xxiv., fig. 2 (1823).

Hapale pygmæa, Wagner in Schreber, Säugeth., v., p. 126 (1855). Castelnau, Voy. Amér. Sud, pl. 5, figs. 1, 2; Schl., Mus. Pays Bas, vii., p. 277 (1876).

Cibuella pygmæa, Gray, Cat. Monkeys Brit. Mus., p. 64 (1870).

Characters.—Face with long brown whiskers, naturally brushed back over the ears; ears small, with a few scattered hairs over them, but no ear-tufts, sunk in the long fur of the head. General colour brownish-tawny; tail ringed with black. The young resemble the adults from their earliest days.

This is the most diminutive Monkey known, and measures only six inches in length.