GNATIIONEMUS. — GENYOMYRUS. 



125 



scaled, with obtusely pointed lobes. Caudal peduncle 3 times as long 



15-18 



as deep, J to \ length of head. 76-81 scales in lateral line, 2^5 va - 



Fig. 104. 



Gnailumemus numen'ms. 

 Type (A. M. C). i, 



transverse series on body, j^yg in transverse series between dorsal and 

 anal, 16 round caudal peduncle. Pale brownish above, whitish beneath. 



Total length 610 millim. 



Upper Congo. — Types in Congo Museum, Tervueren. 

 1. One of the types. Upoto. Capt. Wilverth (C). 



8. GENYOMYRUS. 



Bouleng. Ann. Mils. Congo, Zool. i. p. 17 (1898), Proc. Zool. Soc. 1898, p. 820, 

 and Poiss. Bass. Congo, p. 108 (1901). 



Teeth in the jaws very small, slender, conical, disposed irregularly in 

 several rows, forming a villiform band ; conical teeth on the parasphenoid 

 and on the tongue ; mouth terminal ; nostrils widely separated. Body 

 short ; ventrals nearer pectorals than anal. Dorsal and anal nearly 

 equally developed. Vertebra? 49 (13 + 7 + 29). 



Congo. 



1. GENYOMYRUS DONNYI. 

 Bouleng. 11. cc, Ann. pi. ix. 



Depth of body 3^ to 4 times in total length, length of head 4 to 4|- 

 times. Head once and \ as long as deep, upper profile straight or 

 slightly concave ; snout narrowed, produced, its length 1\ to 3 times its 

 least depth ; mouth terminal ; chin with a tapering dermal appendage 

 or barbel, nearly as long as snout, and pointing forwards ; eye moderate, 

 in middle of head, 3J times in length of snout, twice in interorbital 

 width. Dorsal 31-34, originating slightly behind origin of anal (over 

 2nd or 4th ray), its length \\ to If times in its distance from head. 



