142 MORMTEID^. 



of caudal. Pectoral obtusely pointed, nearly ^ length of head, ventral 

 I length of head. Caudal densely scaled, with rounded lobes. Caudal 

 peduncle 1^ to 2 times as long as deep, ^ or less than -J length of head. 

 95-100 scales in lateral line, ^^^ in transverse series on body, 32-36 in 

 transverse series between dorsal and anal, 18-20 round caudal peduncle. 

 Pinkish or brown, sometimes with a broad bluish-grey stripe extending 

 along each side of the body and tail. 



Total length 570 millim. 



Upper Congo. — Type in Congo Museum, Tervueren. 

 1. Ad. Upper Congo. Brussels University. 



10. HYPEROPISUS. 



Gill, Proc. Ac. Philad. 1862, p. 443 ; Giinth. Oat. Fish. vi. p. 222 (18G6) ; 



Bouleng. Proc. Zool. Soc. 1898, p. 819, and Fish. Nile, p. 70 (1907). 

 Pliagrus, 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 elongate ; ventrals much nearer 

 pectorals than anal. Dorsal very short (12-15 rays) ; anal very long. 

 VertebriE 55-59 (15-16 + 4-6 + 35-38). 



1. HYPEROPISUS BEBE. 

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

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

 Mormyrus dorsali.i, I. Geoffr. Descr. Egypte, Poiss. p. 276, pi. vili. figs. 1 & 2 



(1827) ; Guv. & Val. Hist. Poiss. six. p. 271 (1846). 

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

 Hyperopisus dorsal'n:, Giiiith. Cat. Fish. vi. p. 222 (1866) ; Steind. Sitzb. Ak. 



Wien, Ixi. i. 1870, p. 554, pi. iv. fig. 2. 

 Hyperopisus occidental'is, Giinth. t. c. p. 223. 

 Hyperopisus behe, Bouleng. Proc. Zool. Soc. 1898, p. 820, and Fish. Nile, p. 70, 



pi. v. fig. 2 (1907). 

 1 Hyperopisus tenuicavda, Pellegr. Bull. Mus. Paris, 1904, p. 312. 



Depth of body 3f to SJ times in total length, length of head 4f to 

 5f times. Head a little longer than deep, with strongly curved upper 

 profile ; snout f to J as long as postorbital part of head ; eye moderate, 

 its diameter about | length of snout ; width of mouth i or | length 

 of head. Dorsal 12-16, 2^ to 3 J times as far from head as from 

 caudal. Anal 58-68, originating at equal distance from end of snout 



