740 MR. R. I. pococK — A REVISION OF [June 18, 



the dominant colour. Fi'equently, however, the proximal of the 

 two yellow bauds is not, or scarcely, differentiated from the 

 greyish-brown colour of the basal portion of the hair. Arms 

 externally much like the back, but the yellow is paler and less 

 rich ; hands blackish above. Legs externally yellower than the 

 back, owing to the greater width of the yellow band ; foot and 

 ankle less yellow than thigh. Chin, throat, sides of neck, chest, 

 belly, and inside of limbs greyish or yellowish white. On a level 

 with the shoulders the dark hairs encroach on each side across the 

 chest, partially separating the pale hue of the throat from that 

 of the chest and belly. Tail almost the same colour as the back 

 above, but dai-ker, especially distally ; yellower on the under side, 

 quite yellow at base. Pubic area below the callosities rusty red. 



Length of body and head 290 mm., tail defective. 



Loc. Upper Congo. 



The type of this species is the skin of a female specimen that 

 lived in the Society's Gardens from ISTov. 29th, 1892 to May 15th, 

 1894. It is ticketed "Congo." Subsequently, however, there 

 was a specimen living in the Gardens, belonging to the Hon. 

 Walter Rothschild, which was brought by Mr. J. D. Hamlyn from 

 Brazzaville (Stanley Pool), 700 miles up the Congo, in Belgian ter- 

 ritory. Mr. Hamlyn tells me it was brought witlr other Monkeys 

 to Brazzaville from further inland. Hence we are still ignorant 

 of the exact locality of the species. 



This species, which has remarkably soft and silky hair, is about 

 the size of C. talapoin. In this particular, as well as in the colour 

 of the cheek-hairs, it differs from the rest of the ^^thiops-group. 

 The direction of the hair on the cheeks at once differentiates 

 it from C. talapoin. 



The TALAPOIN-group. 



Miopithecus Is. Geoffr. St. H. 



In addition to the chai'acters for this gi^oup mentioned in the 

 analytical key (p. 681), it may be mentioned that the single 

 known species is the smallest of the members of this group of 

 Monkeys. It is frequently the case in Mammalia that a species 

 composed of small individuals presents characters which are met 

 with in the young of allied species composed of larger individuals. 

 The adult Hippopotamus liheriensis, for example, resembles in 

 many features the young of its larger ally H. am2)hihi.t(,s. So, too, 

 with C. talapoin. The small face and la,i'ge cranium of the adult 

 recall those of the young of other species of this genus, so much 

 so that any one acquainted with the aspect of full-grown 

 specimens of other species would suppose upon a cursory exami- 

 nation that an adult C. talapoin was an immature animal. 



