326 



Annals of the South African Museum. 



PETROCKPHALUS STUHLMANNI, Blgr. 



Mormyrus catostoma (non Gimtb.), Pfeffer, Thierw. O.-Afr. Fische, 

 p. 39 (1896). 



Petrocephalus catostoma, Pappenh., Mitth. Zool. Mus. Berl., iii., 

 1907, p. 344. 



Petrocephalus stuhlmanni, Bouleng., Cat. Fresh. Fish. Afr., i., p. 56 

 (1909). 



Teeth, 14 in upper jaw, 20 in lower. Depth of hody equals length 

 of head, and is 3f times in total length excluding caudal ; head 

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

 short, about l s length of head, rounded, strongly projecting beyond 



FIG. 4. Petrocephalus stuhlmanni. 



mouth ; mouth situated below the eye, its width a little less than 

 i length of head ; eye rather large, 4 times in length of head, about 

 equals snout, f interorbital width. Snout and top of head covered 

 with scars or pits of tubercles ; a row of open pores on each side of 

 back as far as origin of dorsal fin. 



Dorsal iii 17, originating slightly in advance of, or over, anal ; its 

 length barely ^ its distance from the head. Anal iii 23, slightly 

 nearer to base of ventrals than to base of caudal. Pectoral pointed, 

 nearly twice length of ventral and extending beyond base of latter. 

 Caudal with pointed lobes ; caudal peduncle nearly 2 times as long 

 as deep, f length of head. 36 scales in lateral line, \{ scales in 

 transverse series on body, 16 round caudal peduncle. 



Colour (of preserved specimen), uniform brown, lighter below. 



One specimen, 90 mm. in length, from Leydsdorp, Transvaal 

 (J. Naughton). 



