426 Mr. O. Thomas on 



in total length. Head If times as long as broad, its length 

 4^ to 4§ times in total length ; snout rounded, very promi- 

 nent, with nuptial tubercles of unequal size ; eye supero- 

 lateral, in middle of length of head, 5 to 5^ times in length 

 of head, 1\ times in interorbital width ; inner surface of lips 

 with numerous transverse plicee; a minute barbel, hidden in 

 the folds at side of mouth. Dorsal III 10, slightly nearer 

 caudal than end of snout, strongly notched ; longest ray as 

 long as or slightly longer than head. Anal II 5, longest ray 

 | to | length of head. Pectoral as long as head, not reaching 

 ventral ; latter below middle of dorsal. Caudal deeply 

 forked. Caudal peduncle as long as deep. Scales 34- 

 35 gf, 3^-4 between lateral line and root of ventral, 12 round 

 caudal peduncle. Dark greenish above (in life) and on the 

 fins, muddy greenish white below. 



Total length 170 mm. 



Two specimens from Aro, obtained, along with the Gnatho- 

 nemus here described, by Major Bruce, and presented by him 

 to the British Museum. 



Allied to L. obscurus, Pellegr. ; distinguished by the 

 smaller eye and one scale more in a transverse series above 

 the lateral line. 



XLVII. — New African Mammals in the British Museum. 

 By Oldfield Thomas. 



(Published by permission of the Trustees of the British Museum.) 



Perodicticus faustus, sp. n. 



Intermediate between the grey P. ibeanus and the brown 

 species of the West Coast. 



Size as usual. General colour, when seen at a distance, 

 very much as in the brown species (P. edwardsi and batesi) 

 of the Kameruns and Gaboon, but on closer examination there 

 prove to be quite a large number of hoary-tipped hairs inter- 

 mingled with the general fur on the body behind the shoulders 

 — that is to say, the region where in P. ibeanus the colour 

 is almost completely hoary grey. The ordinary woolly fur 

 is slaty at base, then drab-coloured, with blackish tips, 

 considerably darker than in P. ibeanus ; of the thin outer hairs 

 projecting beyond the wool-hairs perhaps half are blackish 

 and half hoary-tipped. Under surface, head, arms, and legs 

 dull drab, a number of hoary-tipped hairs on the outer side 

 of the forearms and thighs ; hands and feet grey, more thinly 



