56 CERCOPITHECUS SFGNATUS. 



inside of legs colored like in C. petaurista. Hind legs co- 

 lored like forelegs , darker than in C. petaurista and C. 

 asca7nas : uuderparts of tail dirty white. Hairs of sides of 

 head grizzled (each hair ringed with white , yellowish and 

 black), abruptly separated from the more reddish colored 

 upperparts of the head by a black band , running from ear 

 to ear over the orbits ; it is a band exactly like that iu 

 C. petaurista , but does not continue in a black band round 

 the vertex like in C. petaurista. Sides of the muzzle and 

 a few hairs on the anterior part of the lower lip black. 

 The ears seem to be somewhat larger and their inside more 

 hairy than in the two mentioned species. 



As we possess only a skull of a young specimen of C. 

 ascanias , I cannot compare the skull of C. signatus (an 

 adult male) with it, but it is very interesting to observe 

 that there are several and very striking differences between 

 the skull of C. signatus and those of C. petaurista which 

 are at my disposal. In C. signatus the skull is higher , 

 the facial part more produced and the jaws more elongate , 

 the zygomatic arches less curved , the nasalia more con- 

 cave than in C. petaurista ; the eye-holes nearly round and 

 wider in all directions, meanwhile in C. petaurista the 

 eye-holes are more elliptical and smaller; moreover the 

 foramen infi'aorbitale is very developed in the latter spe- 

 cies , nearly like in Cercocebus cynamolgos , but absent in 

 C. signatus. The skeleton presents 1 2 costales , 7 lumbares 

 and 3 sacrales like in C. petaurista. 



Unhappily enough the true locality of the specimen un- 

 der consideration is unknown , but there is much reason 

 to believe that it is from West-Africa , perhaps from Banana. 



Cercopithecus biittik o f e r i. 



We possess a very fine series of Cercopithecus petaurista 

 (seven specimens) : adult and young ones , males and fe- 

 males, and they exactly present the same system of colo- 

 ration. Their locality is without exception the Gold-Coast. 

 Now it is highly interesting that we have another series 



J^otes from tlie Leyden IMuseuixi, Vol. VIU. 



