AND THE ,,ROLOWAY." 237 



I think that there will be not iu the least any doubt 

 whether the Monkey here described in fact was a specimen 

 exactly agreeing with our individuals from the Gold-coast 

 as well as with all specimens called Cercopithecus diana in 

 the other Musea. AUamand's » Roloway" has in 1772 been 

 taken by Schreber as specific title, s. n. Simia Roloway 

 (vide Schreber, Saugethiere, Tafel XXV), so that its correct 

 name is Cercopithecus roloway (Schreber). 



Besides the mentioned characteristics there are other 

 ones which distinguish the Roloioay from the Diana , as 

 will be clearly shown in the following short description 

 of both species. 



Cercopithecus roloioay (Schreber). 



Beard long (in adult specimens about 8 cm.), white , 

 a few short black hairs on the chin ; a white diadem or 

 band on the forehead above the eyes ; ears untufted ; a 

 small white or yellowish white streak across the haunches; 

 inside and back of thighs white to light orange; grizzled 

 upperparts of body and of fore legs lighter than in the 

 Diana. 



Cercopithecus Diana (Linnaeus). 



Beard short (in adult specimens about 2 cm.), the fore- 

 most hairs black and shorter than the other white ones ; 

 a white or whitish crescent on the forehead above the 

 eyes ; ears with a white tuft from the inside of the up- 

 perpart of the conch ; a broad white to reddish brown 

 streak across the haunches ; inside and back of thighs 

 bright red-bay ; the grizzled upperparts of body and of 

 fore legs darker than in the Roloway. 



Geographical distributio7i. Linnaeus said that the habitat 

 of the Diana was Guinea; this statement he based upon 



Notes from the Leyden IMuseuni, Vol. XX. 



