CALLITHRIX 223 



There are several specimens of this species in the British Museum, 

 but none of them was selected by its describer as the type, a most 

 unfortunate omission. It was from one of these, No. 75. 6.3.1. that the 

 above description was taken, and this might serve hereafter as The 

 type. 



Callithbix chrysoleuca (Wagner). 



Hapale chrysoleuca Wagn., Wiegm., Archiv., I, 1842, p. 357; Id. 



Schreb., Saugth. Suppl., V, 1855, p. 125 ; Sclat, Proc. Zool. 



Soc. Lond., 1869, p. 594; 1871, p. 229; Gray, Cat. Monkeys, 



Lemurs and Fruit-eating Bats, Brit. Mus., 1870, p. 63, var. b ; 



Schleg., Mus. Pays-Bas, Simise, 1876, p. 277 ; Forbes, Handb. 



Primates, I, 1894, p. 125. 

 Mico sericeus Gray, Proc. Zool. Soc. Lond., 1868, p. 256. 

 Mico chrysoleucus Reichenb., Vollstand. Naturg. Affen, 1862, p. 



6, fig. 23. 

 Hapale argentata Sclat., Proc. Zool. Soc. Lond., 1868, p. 262. 

 Micoella sericeus Gray, Cat. Monkeys, Lemurs and Fruit-eating 



Bats, Brit. Mus., 1870, p. 131. (Append.). 



GOLDEN MARMOSET. 



Type locality. Borba, on the Lower Madeira River, Brazil. Type 

 in Vienna Museum. 



Geogr. Distr. Known only from the type locality. 



Genl. Char. Ears large, naked, margined with long hairs; color 

 pale. 



Color. Head and upper part of body, throat, chest and shoulders 

 ivory white; long hairs of ears buffy; arms, back of thighs, legs, tail 

 and lower part of abdomen golden yellow; under parts buffy; ear 

 tufts white. Ex type Vienna Museum. 



Measurements. Skull : occipito-nasal length, 42 ; Hensel, 33 ; inter- 

 temporal width, 23; breadth of braincase, 26; length of upper molar 

 series, 10; palatal length, 10; length of mandible, 31; length of lower 

 molar series, 12. 



The type of M. sericeus Gray, in the British Museum cannot be 

 separated from C. chrysoleuca. There was no skull of the species in 

 the Vienna Museum of the four examples in the collection, and the 

 measurements given above were taken from the type of M. sericeus 

 Gray. 



This is a peculiar little animal, giving, at first, the impression that 

 it must be a partial albino, but all the specimens agree in their coloring, 

 and it is a very pretty species. 



