CEBUS 89 



Genl. Char. Size large, tail very long, bushy ; head and body of 

 strongly contrasting colors. 



Color. Forepart of head, throat, chest and back of head white; 

 upper parts grayish red to reddish brown, dorsal line and rump darker 

 red in some examples ; limbs brighter red than the body ; hands and feet 

 dark reddish brown or blackish ; under parts dull reddish ; tail varying 

 from fox red or grayish red at base, to yellowish red or sooty yellow 

 at tip. In some specimens the red of the back of the head extends 

 forward in a point on the white crown. 



Measurements. Skull : occipito-nasal length, 80 ; Hensel, 57 ; zygo- 

 matic width, 60; intertemporal width, 40; median length of nasals, 13 ; 

 length of upper molar series, 21 ; length of lower molar series, 21 ; 

 length of mandible, 55. 



Gray's type of C. leucocephalus is in the British Museum, 

 mounted. It is a large monkey and answers in all respects to the 

 description of Humboldt's species, save the breast, but as the hair 

 has disappeared from this part it is not possible to say what the color- 

 ing was originally, but as the rest of the animal accords with C. albi- 

 FRONS it would doubtless be white like the greater part of the head. 



There are two specimens of C. gracilis Spix, in the Munich 

 Museum both marked 'Types,' both young animals, but one consider- 

 ably younger than the other. They have probably faded somewhat 

 for they are paler than Spix's figure but that may have been over 

 colored. In their markings and general distribution of hues these 

 examples resemble C. albifrons (Humboldt), and cannot be sepa- 

 rated from that species. 



The type of C. versicolor Pucheran, and another specimen are 

 in the Paris Museum, the type much darker and richer in color of the 

 two. It does not present any characters to cause its separation from 

 C. ALBIFRONS, the fact that there is no specimen in the Museum bear- 

 ing that name, probably was the main cause for Pucheran having been 

 misled and made to suppose he had an unknown species before him. 

 The type is somewhat darker, and the limbs a deeper red than is seen 

 in the majority of specimens, but the other example is much paler and 

 has, evidently, not yet suffered by exposure to light. The total length 

 is 1,229.90; tail, 673.80; foot, 114.30. The skull, as is the case with 

 so many of the types in the Paris Museum, is in the specimen, and no 

 comparisons can be made or measurements taken ; and it would seem 

 that the earlier writers did not look for cranial characters by which 

 their species might be determined, but relied, apparently, almost 



