1898.] or THE FAMILY MOEMTEID.^. 809 



14. GnATHOKEMUS GEESHOFri. 



Mormyrus greshoffii, Schilthuis, Tijdschr. Nederl. Dierk. Ver. (2) 

 iii. 1891, p. 90, pi. vi. fig. 3. 



Gnathonemus greshqffl, Bouleng. Ann. Mus. Congo, Zool, i. 1 898, 

 p. 11, 



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

 Head a little longer than deep, upper profile descending in a 

 curve ; snout | length of head ; lower jaw with a dermal 

 appendage half the length of the snout ; teeth very small, 3 

 in the upper jaw, 2 (?) in the lower ; eye large, situated in 

 the anterior half of the head, its diameter a little greater than 

 the length of the snout or the interorbital width. Dorsal 35, 

 originating a little in advance of the anal, its length twice 

 in the distance from end of snout. Anal 31, nearer base of 

 ventral than base of caudal. Pectoral pointed, almost as long as 

 head, twice as long as ventral, extending beyond base of latter. 

 Caudal rather small, with pointed lobes. Caudal peduncle 5 times 

 as long as deep, as long as head. 80 scales in the lateral line, 

 8 round caudal peduncle. Silvery. 



Total length 108 millim. 

 Lower Congo. 



15. GKATHONEMrS TAJIANDUA. 



Mormyrus tamandua, GUnth. Proc. Zool. Soc. 1864, p. 22, pi. ii. 

 tig. 1, and Cat. vi. p. 217 (1866). 



Gnathonenms tamandua, Bouleng. Ann. Mus. Congo, Zool. i. 

 1898, p. 11. 



Depth of body 4 to 4i times in total length, length of head 4 

 to 4§. Upper profile of head descending in a strong curve ; snout 

 much prolonged, tubiform, strongly compressed, curved downward?, 

 its length 1| to 2 postocular part of head, and 4 to 5 times its 

 least depth, which nearly equals diameter of eye ; latter | inter- 

 orbital width ; lower jaw with a compressed dermal appendage 

 about as long as the eye ; mouth very small ; teeth very small, 

 conical, 3 in upper jaw, 4 in the lower. Dorsal 26-30, originating 

 above 6th to 8th ray of anal, its length U to li in its distance 

 from head. Anal 30-33, nearer base of caudal than base of 

 ventral. Pectoral obtusely pointed, f to f length of head, ventral 

 g to 1^ ; pectoral extending beyond base of ventral. Caudal densely 

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

 deep, f to I length of head. 70-80 scales in the lateral line, 

 il^ in a transverse line on the body, itl| in a transverse line 

 between dorsal and anal, 12 round caudal peduncle. Brownish 

 above. 



Total length 230 millim. 

 Congo, Old Calabar. 



Pboo. Zool. Soc— 1898, No. LIV. 64 



