126 



ON THE UAKAEI MONKEYS. 



Fig. 11. 



Map of part of the basin of the Amazons, to show the distribution 

 of the Uakari Monkeys. 



Supposed area of B. melanocephalus. 

 B. calvus, 



B. rubicundm. 



important extent amongst themselves, as well as their different ranges, 

 clearly show that, so far as our knowledge yet goes, there is no reason 

 whatever for considering B. calvus an albino form of B. rubricundus 

 moreover in B. calvus a considerable number of hairs on the back &c. 

 are black throughout, just as in B. rubicundus ; this would hardly be the 

 case in an albino. 



Gray's arrangement of these species in the 4 Catalogue of Monkeys ' 

 has already been dealt with by Schlegel : " II semble, d'ailleurs, que ce 

 savant se soit forme une idee a lui propre de ces animaux, puisque, apres 

 avoir mis les OuaJcaria rubicunda et calva dans une catee;orie-a part, 

 laquelle porte en tete : ' pelage blanchatre ou rougeatre,' il ajoute : 

 ' albinos de Y OuaJcaria melanocephala.' On avouera que, ceci est trop fort 

 pour le directeur d'un des plus grands Stablissements de Zoologie" (Mus. 

 P.-B. p. 229.) 



