1898.] OF THE FAMILY MOKMTRrD^. 791 



the mouth ; mouth situated below the eye, its width | length o£ 

 head ; teeth bicuspid, 12-14 in the upper jaw, 18-20 in the lower; 

 nostrils close together, close to the eye ; eye large, longer than the 

 snout, at least | interorbital width. Dorsal 20-22, originating 

 above 4th or 5th ray of anal, its length hardly half its distance 

 from head. Anal 25-29, equally distant from base of ventral 

 and from base of caudal. Pectoral pointed, nearly | length of 

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

 Caudal with pointed lobes. Caudal peduncle 2i to 3 times as long 

 as deep, almost as long as head. 37-40 scales in the lateral line, 

 jg:^ in a transverse line on the body, ^^ in a transverse line 



between dorsal and anal, 16 round caudal peduncle. Silvery, 

 back blackish. 



Total length 55 millim. 



Eovuma Eiver and Lake Nyassa. 



3. ISICHTHYS. 



Isichthys, Gill, Proc. Ac. Philad. 1862, p. 444 (1863); Bouleng. 

 Ann. Mus. Congo, Zool. i. 1898, p. 2. 



Teeth rather large, few, 5-6 in the upper jaw, 6 in the lower ; 

 minute conical teeth on the parasphenoid and on the tongue ; 

 mouth subinferior, below the level of the eye. Body much elon- 

 gate ; ventrals much nearer anal than pectorals. Dorsal a little 

 longer than anal. Vertebrae 64 (26 -f 38). 



1. Isichthys heneyi, 



Isichthys henryi, Gill, Proc. Ac. Philad. 1862, p. 444. 



Mormyrops henryi, Giinth. Cat. vi. p. 224 (1866) ; Hubrecht, 

 Notes Leyd. Mus. iii. 1881, p. 70. 



Mormyrus henryi, Giinth. Ann. & Mag. N. H. (3) xx. 1867, 

 p. 115 ; Steind. Notes Leyd. Mus. xvi. 1894, p. 66. 



Mormyrus cohitiformis, Peters, Sitzb. Ges. nat. Fr. Berl. 1882, 

 p. 72. 



Mormyrus (Isistius) henryi, Sauvage, Bull. Soc. Zool, Prance, 

 1884, p. 207, pi. vi. fig. 1. 



Depth of body 10 or 11 times in total length, length of head 6 

 to 7| times. Head 1| to twice as long as deep ; snout rounded, 

 |- to 5 length of head ; mouth subinferior, below level of eye, its 

 width J length of head ; teeth notched, 5 or 6 in the upper jaw, 

 6 in the lower ; nostrils midway between eye and end of snout ; 

 eye small, hardly | length of snout, ^ interorbital width. Dorsal 

 39-50, longer than its distance from the head. Anal 38-47, 

 originating a little postei^ior to origin of dorsal. Pectoral about ^ 

 length of head. Caudal small, with obtusely pointed lobes. Caudal 

 peduncle twice as long as deep, | length of head. 120-140 scales 

 in the lateral line, f between dorsal and anal, 18-20 round caudal 

 peduncle. Dark brown. 



Total length 205 millim. 



"West Africa, from Liberia to Maynmba, French Congo. 



