CALLICEBUS 237 



An elaborate paper on the axial skeleton of the Primates, with 

 critical comparisons between the Families and Genera and their 

 resemblance to Man. 



1866. /. E. Gray, in Annals and Magazine of Natural History. 



Callicebus ornatus first described as Callithrix ornatus; and 

 C. CALiGATUS redescribed as Callithrix castaneo-ventris. 



1870. /. E. Gray, Catalogue of Monkeys, Lemurs and Fruit-eating 

 Bats, in British Museum. 



Under the genus Callithrix, eleven species of Callicebuus 

 are here given. (C.) cupreus; (C) amictus ; (C.) torquatus; 

 (C.) donacophilus (nee D'Orb.), = Callicebus pallescens 

 Thos. ; (C.) MOLOCH ; (C.) ornatus; (C.) personatus; (C) 

 nigrifrons; (C) castaneo-ventris = Callicebus caligatus; 

 (C.) melanochir, and (C) gigot. 



1883. A. von Pelzeln, Brasilische Sdugethiere. 



Six species of Callicebus are here enumerated under Calli- 

 thrix, viz., (C) nigrifrons; (C.) moloch ; (C) caligata; 

 (C.) brunnea; (C) gigot, and (C) torouata. 



1900. Cabrera, in Anales Sociedad Espafiola de Historia Natural. 



Callicebus leucometopa first described as Callicebus cupreus 

 leucometopa. 



1907. D. G. Elliot, in Annals and Magazine of Natural History. 

 Callicebus ustofuscus, and C. subrufus first described. 



1907. O. Thomas, in Annals and Magazine of Natural History. 

 Callicebus pallescens first described. 



1908. 0. Thomas, in Annals and Magazine of Natural History. 

 Callicebus hoffmannsi first described. 



1911. O. Thomas, in Annals and Magazine of Natural History. 

 Callicebus emili^ first described. 



GEOGRAPHICAL DISTRIBUTION OF THE SPECIES. 



Brazil is evidently the home of the members of this genus and 

 they have a wide distribution over its territory, with representatives on 

 the west in Colombia, Ecuador, Peru and Bolivia. In the north on 

 the right bank of the Orinoco near the Mission of Santa Barbara, C. 

 torqu.\tus is found and its range is extended in the forests watered 

 by the Rios Cassiquiare, Guaviare, Negro and Solimoens, going, accord- 

 ing to Tschudi, (1. c.) in southeastern Peru as far as Latitude 12°. On 

 the Upper Amazon in the forests of Olivenqa near the Rio Solimoens 

 and thence to Peru (Tschudi), its near relative C. amictus occurs. At 



