810 MR. G. A. BOULENGBR ON THE FISHES [NoV. 15, 



16. GUTATHONEMFS MIEUS. 



Gnathonemus mirus, Bouleng. Ann. Mus. Congo, Zool. i. 1898, 

 p. 11, pi. iii. fig. 2. 



Depth of body 3| times in total length, length oi: head 4. 

 Tipper profile of head descending in a strong curve ; snout much 

 prolonged, tubiform, strongly compressed, curved downwards, its 

 length twice postocular part of head, and 3 times its least depth, 

 which is twice diameter of eye ; latter f interorbital width ; lower 

 jaw with a long, compressed, attenuate dermal appendage, 

 measuring nearly | length of snout; mouth very small; teeth 

 very small, conical, 3 in the upper jaw, 4 in the lower. Dorsal 

 34, originating above 4th ray of anal, its length Ig in its distance 

 from head. Anal 35, equally distant from base of ventral and base 

 of caudal. Pectoral pointed, about 4 length of head, extending 

 to middle of ventral, which is only i as long. Caudal scaled, with 

 obtusely pointed lobes. Caudal peduncle 3 times as long as deep, 

 |- length of head. 78 scales in the lateral line, ^5 i^ ^ ti'ansverse 

 line on the body, f^ in a transverse line between dorsal and anal, 

 12 round caudal peduncle. Brownish above. 



Total length 320 miUim. 



Upper Congo. 



17. Gnathonemus elephas. 



Gnathonemus elephas, Bouleng. Ann. Mus. Congo, Zool. i. 1898, 

 p. 12, pi. V. fig. 1. 



Depth of body 3f to 3| times in total length, length of head 

 4 to 4^. Upper profile of head descending in a very strong curve ; 

 snout much prolonged, tubiform, strongly compressed, directed 

 almost straight downwards at right angles to the outline of the 

 pectoral region, its length nearly twice postocular part of head, 

 3 to 4 times its least depth, which is 1 g diameter of eye ; latter f 

 interorbital width ; lower jaw with a short, wart-like, cylindrical, 

 dermal appendage as long as or a little shorter than diameter of 

 eye ; mouth very small ; teeth very small, conical, 3 in the upper 

 jaw, 4 in the lower. Dorsal 33, originating above 5th ray of 

 anal, its length Ig to 1|- its distance from head. Anal 34-36, 

 equally distant from base of ventral and base of caudal. Pectoral 

 pointed, little sliorter than head, extending to middle or second 

 third of ventral, and twice as long as the latter. Caudal scaled, 

 with pointed lobes. Caudal peduncle 3 times as long as deep, as 

 long as head or a little shorter. 80 scales iu the lateral Line, ^ in 

 a transverse line on the body, \^^ in a transverse line between 

 dorsal and anal, 12 round caudal peduncle. Brownish above. 



Total length 400 millim. 



Upper Congo. 



18. Gnathonemus rhtnchophoeus. (Plate LI.) 

 Gnathmumus rhynchophorus, Bouleng. Ann. Mus. Congo, Zool. 



i. 1898, p. 13, pi. V. fig. 2. 



