420 CYPBINODONTIDiE. 



longer than the ventral fin, which is inserted at equal distance from the end of the 

 snout and from the root of the caudal fin. Caudal fin pointed, longer than the head. 

 Caudal peduncle as long as deep. Scales finely striated, 27 or 28 in a longitudinal 

 series, 16 or 18 round the body in front of the ventral fins ; lateral line indicated by a 

 series of pits. 



Yellowish brown, with two dark brown bands along each side, the upper extending 

 from above the gill-cover to below the caudal peduncle, the lower from the eye to the 

 root of the caudal fin ; fins whitish, unspotted. 



Grows to a length of 45 millimetres. 



Discovered by the late Dr. Marno in the Bahr-el-Seraf and in the Bahr-el-Gebel. I 

 I have examined a single specimen from Mongalla, near Gondokoro, presented by 

 Dr. F. Werner in 1905. 



//. bifasciatus is easily distinguished from the other species known from the Nile 

 system by its pointed caudal fin. 



5. HAPLOCHILUS PUMILUS. 

 (Plate LXXIX. fig. 10.) 



Boulenger, Tr. Zool. Soc. xvii. 1906, p. 554, pi. xxxii. fig. 4. 



Depth of body three and two-thirds to four and a half times in the total length, 

 length of head three and a half to four times. Head flat above ; snout very short, 

 truncate, with the mouth directed upwards, the lower jaw strongly projecting; teeth 

 small, forming a narrow band ; eye better visible from below than from above, longer 

 than the snout, two-thirds to three-fourths the length of the postorbital part of the 

 head; interorbital width two-fifths the length of the head. Dorsal fin with 10 or 

 11 rays, originating above the anterior third of the anal, nearer to the root of the 

 caudal fin than to the occiput ; posterior rays longest, one-half to two-thirds the length 

 of the head. Anal fin with 14 or 15 rays, originating at equal distance from the eye 

 and from the root of the caudal fin ; posterior rays longest, about as long as dorsals. 

 Pectoral fin two-thirds the length of the head, reaching beyond the base of the ventral 

 fin, which is much shorter and inserted nearer to the end of the snout than to the root 

 of the caudal fin. Caudal fin rounded, nearly as long as the head. Caudal peduncle 

 once and one-third as long as deep. Scales with very indistinct concentric striae, 

 27 to 29 in a longitudinal series, 16 round the body in front of the ventral fins ; no 

 lateral line pits. 



Yellowish, more brownish on the back, where the scales have darker outlines ; fins 

 purplish, without any markings. 



The largest specimen measures 36 millimetres. 



