PETEOCEPHALUS. 



49 



a level with lower border of eye ; eye large, longer than snout, f to -f 

 interorbital width. Dorsal 29-33, originating above 3rd to 10th ray of 

 anal, its length 1| to 2 times in its distance from head. Anal 31-37, 

 equally distant from base of ventral and from base of caudal. Pectoral 

 pointed, f to f length of head, twice as long as ventral, and extending 

 beyond base of latter. Caudal with pointed lobes. Caudal peduncle 

 2J to 3 times as long as deep, f to f length of head. 39-50 scales 

 in lateral line, ^^^[5 in transverse series on body, jg^ in transverse 

 series between dorsal and anal, 10-12 round caudal peduncle. Silvery, 

 greyish on the back; extremity of anterior dorsal rays brownish or 

 blackish. 



Total length 195 millim. 



Nile and Chad Basins, Niger. 



J. Petherick, Esq. (C). 



Dr. Eiippell (C). 

 L. Loat, Esq. (0.). 



J. Petherick, Esq. (C). 

 L. Loat, Esq. (C). 



Capt. S. Flower (P.). 

 Mr. P. C. Zaphiro (C.) ; 

 W.N. McMillan, Esq. (P.). 

 L. Loat, Esq. (C). 



Capt. G. B. Gosling (P.). 

 Capt. G. F. Abadie (P.;. 



2. PETROCEPHALUS SAUVAGII. 

 Mormyms {P etrocplialus) sauvagii, Bouleng. Ann. & Mag. N. H. (5) xix. 1887, 



p. 149. 

 Mormyms cypriuoides (non Geoffr.), Perugia, Ann. Mus. Geneva, xxx. 1891, p. 976. 



VOL. I. ^ 



