20 On neio West-Afrivan Freshwater Fishes. 



line; fins uniform greyish; sometimes a dark spot in the 

 axil and another at tlie base of the ventral fin. 



Total length 32 mm. 



Several specimens from Marimba, Lake Sarmento, Angola, 

 collected by Dr. W. J. Ansorge. 



This species is allied to //. spilanchen, A. Diim., but easily 

 distinguished by the shorter snout, the projecting lower jaw, 

 and the larger caudal fin. Secondary sexual characters dj 

 not appear to exist. 



Peocatopus, gen. nov. (Cyprinodontid). 



Characters of IlapIochiluSj McCIell., hat ventral fins far 

 forward, almost below the base of the pectorals, which are 

 inserted very high up the sides. 



Procatopus noiotcenia. 



Body very strongly compressed, its depth equal to length 

 of head and 3 times in total length ; upper surface of head 

 and anterior part of back quite flat. Snout as long as eye, 

 the diiimeter of which is 3 to 3^ times in length of head ; 

 lower jaw projecting beyond uj)per ; interorbital width not 

 quite half length of head ; sensory canals on upper surface 

 of head very strongly developed. Dorsal 9-11, originating 

 at equal distance from occiput and from root of caudal 

 and above middle of base of anal ; posterior ray longest, 

 |t to ^ length of head. Anal 14-17, longest rays, in 

 third fourth, as long as head or a little shorter. Pectoral 

 about f length of head. Ventral of 6 rays, outer produced 

 into a filament, and at least as long as head. Caudal 

 fin truncate, as long as head. Caudal peduncle as long as 

 deep. 25-28 scales in a longitudinal series, 7 or 8 in a 

 transverse series ; no lateral line ; exposed surface of scales 

 regularly hexagonal, more than twice as deep as long on the 

 middle lateral series. Pale yellowish olive above, yellowish 

 white beneath ; a bright yellow streak on each side of the 

 back, from behind the su[)raciliary edge to the base of the 

 caudal fin, bordering the dorsal fin ; an orange streak on the 

 middle of the back, from the occiput to tlie origin of the 

 dorsal fin ; fins greyish, anal and caudal tinged with yellow 

 at the base. 



Total length 48 mm. 



Southern Cameroon. Numerous specimens were obtained by 

 Mr. G. L. Bates 15 or 20 miles S.W. of Efulen, in streams 

 tributary of the Lobi River, which reaches the sea at Batanga. 



