784 MR. G. A. BOULENGEH ON THE FISHES [Nov. 15, 



times as far from the head as from the base of the caudal. Anal 

 36-39, originating considerably in advance of dorsal (its 12th to 

 l-ith ray corresponding to the first dorsal ray), and at nearly equal 

 distance from head and base of caudal. Pectoral f length of head, 

 ventral |. Caudal small, densely scaled in its basal half, with 

 rounded lobes. Caudal peduncle twice as long as deep, 3 length 

 of head. 70-74 scales in the lateral line, ,4^ in a transverse line 



' 14-16 



on the body, 14 or 15 in a transverse line between dorsal and anal, 

 12 round caudal peduncle. Dark brown. 



Total length 270 millim. 



Gaboon, Ogowe. 



6. MOBMTEOPS ENGTSTOilA. 



Mormyrops engystoma, Bouleug. Ann. Mus. Congo, Zool. i. 1898, 

 p. 3, pi, i. fig. 1. 



Depth of body 7 to 7| times in total length, length of head 4| 

 to 5. Head nearly twice as long as deep, with straight declivous 

 upper profile ; snout rounded, projecting a little beyond the mouth ; 

 ^^ idth of mouth hardly | length of snout ; teeth notched, 12 in 

 each jaw ; eye very small, situated in the anterior third of the head, 

 its diameter 3 times in length of snout, 2| to 3 times in inter- 

 orbital width. Dorsal 19-20, ^ length of anal, originating twice 

 as far from the end of the snout as from the base of the caudal. 

 Anal 35-37, originating considerably in advance of dorsal (its 9th 

 ray corresponding to the first dorsal ray), and equally distant from 

 Lead and base of caudal. Pectoral f length of head, ventral f. 

 Caudal rather small, scaled at the base, with rounded lobes. 

 Caudal peduncle 2 to 2^ as long as deep, 5 to | length of head. 

 80-93 scales in the lateral liue, |^^ in a transverse line on the body, 

 18-19 in a transverse line between dorsal and anal, 16 round 

 caudal peduncle. Pale brown, speckled with darker. 



Total length 145 millim. 



Lower Congo. 



7. MOBMTBOPS MASriANUS. 



Mormyrops masuianus, Bouleng. Ajin. Mus. Congo, Zool. i. 1898, 

 p. 4, pi. ii. fig. 1. 



Depth of body 6 times in total length, length of head 4|. 

 Head 1| as long as deep, with straight, declivous upper profile; 

 snout rounded, projecting a little beyond the mouth ; width of 

 mouth a little greater than length of snout; teeth truncate, 12 in 

 the upper jaw, 14 in the lower ; eye very small, situated in the 

 anterior third of the head, its diameter 3 times in length of snout 

 or interorbital width. Dorsal 30, 4 length of anal, originating 

 ] g as far from the end of the snout as from the base of the caudal. 

 Anal 40, originating a little in advance of dorsal (its 7th ray 

 corresponding to the first dorsal ray), and slightly nearer head 

 than base of caudal. Pectoral | length of head, ventral 5, 

 Caudal rathpr small, densely scaled, with rounded lobes. Caudal 



