76 CEBUS 



peruanus; and C. unicolor Spix. probably, redescribed as C. 

 iJavescens cuscinus. 

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

 Cebus apiculatus described. 



1909. D. G. Elliot, in Bulletin American Museum of Natural History, 

 New York. 



Cebus capucinus nigripectus, and Cebus malitiosus first de- 

 scribed; and the status of C. capucinus (Linn.), and C. 

 APELLA (Linn.), explained and fixed. 



1910. D. G. Elliot, in Annals and Magazine of Natural History. 

 Cebus versuta and Cebus caliginosus described. 



GEOGRAPHICAL DISTRIBUTION OF THE SPECIES AND SUBSPECIES. 



It must be acknowledged that the geographical distribution of the 

 species of the genus Cebus is imperfectly known. Much of the vast 

 territory of South America which they inhabit is unexplored, and we 

 are entirely ignorant of the animals to be found in it. A large number 

 of the described species are known only from the type locality, and the 

 range of others is indefinite and unsatisfactory. A serious difficulty 

 also exists in the fact, that it is often uncertain what species a writer 

 is referring to, for although he employs the name of a well known 

 species, he frequently has in mind quite a different one. Hence the 

 confusion and intricacy of the synonymy. Thus the C. capucinus of 

 Authors is not the C. capucinus Linnaeus, and the C. apella Linnaeus, 

 is seldom recognizable in the species given by writers under that name ; 

 and the C. gracilis Gray is not C. gracilis Spix, nor is the C. robustus 

 Tschudi, the same species that Kuhl and Wied call by that name. 

 Many examples of this confused nomenclature could easily be given to 

 prove how very difficult it is to accurately establish the species intended, 

 and unless the specimen referred to is extant and accessible, too often a 

 correct decision is impossible. Fully aware, therefore, of the great 

 limitation to our knowledge, the writer can only attempt to give the 

 restricted boundaries of the dispersion of the Cebi which have been 

 ascertained at the present time. The most northern habitat of any 

 species is Central America, and there, from and including Nicaragua 

 to Panama, C. capucinus is found ranging, and also into northern 

 South America to Colombia. To the north of Nicaragua no species of 

 Cebus is found. In the three Guianas: English, Dutch and French, C. 

 apella (Linn.), dwells, and from Cayenne in French Guiana C. 

 castaneus was brought, its type locality and range however unknown. 



