IN LIBERIA, 11 



the late Schlegel, and finally because I now can give a 

 better description of Gray's typical specimen , kindly fur- 

 nished by Mr. Oldtield Thomas of the British Museum. 



Gray described his Monkey, C. melanogenys , in 1845, 

 after a half-grown specimen in the British Museum , which 

 died in a menagerie near London, and was said to have 

 come from Western Africa. In the P. Z. S. L. 1849 is a 

 colored plate , representing his type specimen together with 

 another new species, Cercopithecus ludio (C lupio on the 

 plate), but the figures are not numbered: the darkest co- 

 lored one is C. melanogenys. In Monteiro's collections from 

 Angola was a flat skin of C. melanogenys and Monteiro 

 stated that it is very abundant at Encoge, two days' journey 

 to the south of Bembe (P. Z. S. L. 1860). I find nowhere 

 any other indication concerning this species and it seems 

 therefore to be very rare and a desideratum to all other 

 Musea. Gray's descriptions however in Ann. of Nat. Hist. 

 1845, P. Z. S. L. 1849 and Cat. of Monkeys, etc., 1870 

 do not agree: 



1845. J 849. 1870. 



Black, olive speckled. Dark olive , minutely yel- Fur olive, minutelij yel- 

 low-grizzled, low-grizzled. 



Beneath ashy white. JJnderpart of the body Greyish beneath. 



lohitish. 



Temples yelloivish. A small spot on each Temples whitish. 



temple lohite. 



and Oldfield Thomas writes me that the figure (P. Z. S. 

 L. 1849) is worse than the description! 



The description of the type runs as follows : C. mela- 

 nogenys (type) is a small monkey ; head and body ± 400 

 mM., tail (tip broken) ± 430 mM., hind foot 98.8 mM. — 

 The legs^ are dark grey outside , gradually darkening to 

 black on the hands and feet; inside whitish. The back is 

 finely grizzled with black and orange; the centre of the 

 back , however , washed with deep rufous (in the other 

 specimen the back is all grizzled , and there is a more 

 general olivaceous tinge). A band across the eyebrows , and 

 passing backwards over the ear, and the lower cheeks, 



Notes from the Leyden Museum, Vol. X. 



