13, sJaccHus. : 63 
Hapale aurita. The White-eared Marmoset. BLM. 
Blackish ; minutely punctulated with yellow or reddish; sides 
of head, limbs, and hinder part black; crown brown; face large ; 
spot on forehead and short ear-tufts grey. 
Jacchus auritus, Geoff. Ann. Mus.; Gray, P. Z. S. 1866 ! 
Var. 1. Back blackish, without any indication of cross band. 
Var. 2. Back red; punctulated with narrow, faint, paler cross 
bands, especially on the loins, : 
Hab. Brazil. 
See 
a. Jacchus hwmeralifer, Geoff. Face, shoulders, chest, arms, 
and ear-tufts white; thighs brown-and-white grizzled. 
Hab. Brazil. 
b. Hapale chrysoleucos, Natterer; A. Wagner, Ann. Nat. Hist. 
No. 74, 1843; Wiegm. Archiv, viii. H. albida, mani- 
bus caudaque splendide rutilo-fulvis, auriculis albo penicil- 
latis. Altitudo 9", long. caude 123”. Bahia. Mus. Vienna. 
13. JACCHUS. 
Conch of ears large, bald, with a tuft of elongated hairs, forming 
an expanded tuft on the front edge of the ear opening. Hair of 
sides of crown elongate. Tail annulated with black. Back cross 
banded. Lower cutting-teeth elongate, slender, cylindrical, as long 
as canines. : 
Jacchus, Gray, P. Z. S. 1866. 
Jacchus vulgaris. The Black-cared Marmoset. B.M. 
Blackish ; back and outside of the thighs with grey cross bands ; 
head with white spot on upper part of nose. 
Simia Jacchus, Linn. Ouistiti, Bugfon, H. N. xv. p. 96, t. 14, Hapale 
Jacchus, Ilhger ; Gray, P. Z. S. 1842 ! 
Var. 1. Ear-tufts white, head black. 
Jacchus vulgaris, Geoff. Ann, du Mus, 
Var. 2. Har-tufts white, hinder part of head and back of neck 
rey. 
: ee albicollis, Spex, Bras. p. 83, t. 25. 
Var. 3. Ear-tufts black, head and neck black. 
Jacchus penicillatus, Geoff; Spor, Bras, t. 26. 
Var. 4. Ear-tufts black, head and neck blackish, face, temples, and 
forehead whitish. 3 
Jacchus leucocephalus, Geoff. 
Var. 5. Like var. 4; but face, cheeks, and throat paler grey 
brown. 
Jacchus leucogenys, Gray, List Mamm. B. M. 
