56 mormykidjE. 



of caudal, or a little nearer latter. Pectoral pointed, f- length of 

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

 Caudal scaled at the base, with pointed lobes. Caudal peduncle 2^ 

 times as long as deep, f length of head. 41-44 scales in lateral 

 line, pj^jTj in transverse series on body, ^ in transverse series between 

 dorsal and anal, 10 or 12 round caudal peduncle. Silvery, the back and 

 the anterior rays of the dorsal darker. 



Total length 105 millim. 



White Nile. 



1. Type. Fashoda. L. Loat, Esq. (P.). 



2. Ad. Between Khartum and Sobat P. Mr. P. C, Zaphiro (C.) ; 



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



8. PETROCEPHALUS STUHLMAKNI, sp. n. 



Mormyrus catostoma (non Giinth.), Pfeffer, Thienv. O.-Afr., Fisehe, p. 39 (1896). 

 Petrocephalus catostoma, Pappenh. Mitth. Zool. Mus. Berl. iii. 1907, p. 344. 



Depth of body equal to length of head, 3 J times in total length. 

 Head slightly longer than deep, with convex upper profile ; snout very 

 short, 4 length of head, rounded, strongly projecting beyond mouth ; 

 mouth below eye, its width j length of head; teeth bicuspid, 12-16 

 in upper jaw, 20-24 in lower ; eye rather large, as long as snout, 

 about f interorbital width. Dorsal 20-22, originating above 5th ray of 



Petrocepluthis stuhlmanni. 

 Type. 



anal, its length hardly half its distance from head. Anal 25-29, a little 

 nearer base of ventrals than base of caudal. Pectoral pointed, § length 

 of head, nearly twice as long as ventral and extending beyond base of 

 latter. Caudal with pointed lobes. Caudal peduncle hardly more than 

 twice as long as deep, |- length of head. 35-38 scales in lateral line, 



