1898.] OP THE FAMILY MORMYBID^. 819 



Upper profile of head desceuding in a curve ; snout much pro- 

 duced, trunk-like, a little longer than the postocular part of the 

 head, its head 4:^ times its least depth ; mouth very small, lower 

 jaw slightly projecting, with thick lips ; teeth very small, notched, 

 5 in the upper jaw, 12 in the lower; eye small, its diameter 

 7i times in length of snout, 2 in interorbital width. Dorsal 

 75, originating in advance of base of ventral, nearly 5 times 

 as long as anal, I5 as long as its distance from the end of the 

 snout. Anal 19, originating at equal distance from the base of 

 the pectoral and that of the caudal. Pectoral obtusely pointed, 

 nearly | length of head, ventral ^. Caudal densely scaled, with 

 rounded lobes. Caudal peduncle 1| as long as deep, less than g 

 length of head. 95 scales in the lateral line, |^ in a transverse 

 series on the body, 32 in a transverse series between dorsal and 

 anal, 18 round caudal peduncle. Pink, with a broad bluish-grey 

 stripe extending along each side of the body and tail. 



Total length 570 millim. 



Upper Congo. 



14. MoBMYBtrS TENUIEOSTEIS. 



Mormyrus tenuirostris, Peters, Sitzb. Ges. naturf. Fr. Berl. 1882, 

 p. 73. 



Depth of body 5 times in total length, length of head S^. Snout 

 thin, produced, curved downwards ; eye in the middle of the head ; 

 teeth bicuspid. Dorsal 60, originating further back than base of 

 ventrals, not longer than its distance from the middle of the snout. 

 Anal 20. 



Total length 125 millim. 



Adi Eiver, Ukamba, East Africa. — Type in Berlin Museum. 



9. Hypeeopisus. 



Hyperopisus^ Grill, Proc. Ac. Philad. 1862, p. 443; Giinth. Cat. 

 vi. p. 222 (1866); Bouleng. Ann. Mus. Congo, Zool. i. 1898, p. 2. 



Phagrus, Marcusen, Mem. Ac. St. Petersb. (7) vii. 1864, no. 4, 

 p. 111. 



Teeth in jaws small, notched, few (3-5 in the upper jaw, 5-6 in 

 the lower) ; parasphenoid and tongue with a pavement of large 

 spheroid teeth ; mouth terminal, below the level of the eyes. 

 Nostrils moderately far apart, remote from the eye. Body elon- 

 gate; ventrals much nearer pectorals than anal. Dorsal very short 

 (12-15 rays); anal very long. Vertebrae 55-59 (15-16 + 4-6 + 

 35-38). 



1. Hypeeopisus bebe. 



Sonnini, Voy. Egypte, pi. xxi. fig. 3 (1799)- 

 Mormyrus bebe, Lacep. Hist. Poiss. v. p. 619 (1803). 

 Mormyrus dorsalis, Geoffr. Descr. Egypte, Poiss. p. 276, pi. viii. 

 figs. 1 & 2 (1829) ; Cuv. & Val. xix. p. 271 (1846). 

 Phagrus dorsalis, Marcus. 1. c. p. 142. 



