786 MR. G. A. BOULBNGBE ON THE FISHES [NoV. 15, 



10. MOEMYEOPS MAEI.E. 



Mormynis {Mormyi-ops) marice, Schilthuis, Tijdschr. Ned. Dierk. 

 Ver. (2) iii. 1891, p. 92. 



Mormijrops marm, Bouleng. Ann. Mus. Congo, Zool. i. 1898, p. 3. 



Depth of body 5g to 6g times in total length, length of head 4 

 to 5 times. Head neai'ly twice as long as deep, with slightly 

 concave upper profile ; snout rounded, jaws equal ; width of 

 mouth a little less than length of snout; teeth truncate, 14 or 16 

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

 head, its diamett-r '^ or 4 times in length of suout, 2| to 3| times 

 in interorbital width. Dorsal 34-37, | to f length of anal, origi- 

 nating at equal distance from the head and the base of the caudal, 

 or a little nearer the latter. Anal 50-59, originating in advance 

 of dorsal (its 8th or 9th ray corresponding to the first dorsal ray), 

 and much nearer base of caudal than end of snout. Pectoral | 

 length of head, ventral j to f . Caudal very small, scaled at the 

 base, with rounded lobes. Caudal peduncle not longer than deep, 

 ^ to -^ length of head. 100-105 scales in the lateral line, ^^ in a 

 transverse line on the body, 28-31 in a transverse line between 

 dorsal and anal, 22-24 round caudal peduncle. Whitish, uniform 

 or finely speckled with brown. 



Total length 300 miUim. 



Lower Congo. 



11. MOEMYKOPS MICROSTOMA. 



Mormyrops microstoma, Bouleng. Ann. Mus. Congo, Zool. i. 

 1898, p. 6, pi. i. fig. 3. 



Depth of body 63 times in total length, length of head 4|-. 

 Head twice as long as deep, with straight upper profile ; snout 

 rounded, projecting beyond the mouth ; width of mouth |- length 

 of snout ; teeth truncate, 14 in each jaw ; eye moderate, its dia- 

 meter 1| in length of snout, 2 in interorbital width. Dorsal 45, 

 nearly | length of anal, originating nearly twice as far from the 

 end of the snout as from the base of the caudal. Anal 70, 

 originating considerably in advance of dorsal (its 17th ray corre- 

 sponding to the first dorsal ray), and nearer the head than base of 

 caudal. Pectoral g length of head, ventral nearly g. Caudal very 

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

 hardly as long as deep, ^ length of head. 102 scales in the lateral 



line, Y5 in a transverse line on the body, 16 in a transverse line 



between dorsal and anal, 14 round caudal peduncle. Blackish 

 brown. 



Total length 165 millim. 



Upper Congo. 



12. MOKMXROPS ATTENUATUS. 



Mormyrojjs attenuatus, Bouleng. Ann. Mus. Congo, Zool. i. 1898, 

 p. 6, pi. i. fig. 4. 



Depth of body 8| times in total length, length of head 6^. 



