INTRODUCTION Ixxiii 



PsEUDOGORiLLA has One species P. mayema? from the Congo 

 forest. 



The last genus of the Primates of the Old World is Pan em- 

 bracing the Chimpanzees. Fifteen species are tentatively acknowledged 

 in this work, but we are without sufficient information regarding them, 

 and their validity is in almost as great uncertainty as is that of some 

 of the species of the genus Gorilla. The ranges of these different 

 species are either not known at all, or very imperfectly, and the greater 

 number of forms are found in the West African Subregion from 

 Sierra Leone to the Gaboon. In this comparatively restricted district 

 of the African Continent all the species of Chimpanzees, save two, so 

 far as is known, are to be met with. They are P. calvus ; P. fuligi- 

 Nosus; P. satyrus; P. kooloo-kamba ; P. leucoprymnus ; P. pyg- 

 M.EUs; P. chimpanse; P. aubryi ; P. vellerosus; and P. fuscus. 

 All these are found in Gaboon and Cameroon, save two, P. vellerosus 

 absent from Gaboon, and P. satyrus not found in Cameroon. In the 

 East African Subregion two species only are known to dwell, P. 

 schweinfurthi in the Nyam-nyam country, and P. s. marungensis 

 from the vicinity of the Albert Nyanza, and in the Congo forest. 



In Neogea, embracing the Western Hemisphere, we find the 

 Primates are represented in the Neotropical region only, and Mexico 

 contains the forms that reach the highest northern limit. Here is 

 found a subspecies of Alouatta, A. p. mexicana in the State of Vera 

 Cruz, and one species of Ateleus, A. pan. Two species are found in 

 Guatemala, Alouatta villosa ; and Ateleus pan. Nicaragua has five 

 species of Primates, one, Aotus rufipes, (but doubtfully a resident of 

 that State) ; Alouatta palliata; Ateleus geoffroyi; A. ater: and 

 Cebus capucinus. Costa Rica is represented by two species of 

 diflferent genera QEdipomidas geoffroyi; and Saimiri cerstedi ; both 

 also met with in Panama ; and on Coiba Island in the Bay of Panama 

 Alouatta p. coibensis is found. On the Island of Trinidad Alouatta 

 INSULANUS is met with. On the continent of South America beginning 

 with the Guianas, Brazilian Subregion, five species are found in all : 

 Saimiri sciurus ; Actus trivirgatus ; Alouatta macconnelli ; 

 Ateleus paniscus; and Cebus apella ; some of these having a wide 

 distribution in South America. French Guiana possesses besides the 

 species just named, Cercopithecus rufimanus and Pithecia capil- 

 limentosa; and British Guiana has four additional, Cercopithecus 

 MIDAS ; Pithecia satanas; P. chiropotes; and Cebus castaneus. 

 Dutch Guiana has also Cercopithecus midas. Venezuela has eight 

 species of Primates: Cercopithecus ursulus; Callicebus tor- 



