The Freshwater Fishes of South Africa. 



489 



Colour (of preserved specimen), blackish, base of scales dark ; a 

 dark opercular spot ; tip of dorsal fiu and distal extremity of anal 

 whitish, indistinct dark and light longitudinal streaks on dorsal. 



FIG. 123. Tilapia, macrochir. Type. ^. 



One specimen, 292 mm. in length, from Victoria Falls, Zambesi 

 River (F. Kumsay). Bulawayo Museum. 



It is also reported from Lakes Bangwelu and Mweru. 



7. TILAPIA SHESHEKENSIS, n. sp. 



Teeth small, in 3 series, 60 (circa) in outer row on upper iaw. 

 Depth of body 2^ times in total length excluding caudal, length of 

 head 2~ times. Head nearly twice as long as broad, upper profile 

 elevated ; snout 1| times as broad as long, ^ length of postocular 

 part of head ; eye 3| times in length of head, interorbital width, 

 If as long as least depth of preorbital ; mouth nearly f width of 

 head, extending to between nostril and eye ; 2 series of scales on the 

 cheek, width of scaly part nearly ~ diameter of eye. Gill-rakers 

 short and thick, 24 on lower part of anterior arch. 



Dorsal xvii 12 ; spines subequal from the 6th ; longest spines f- 

 length of head ; longest soft rays | length of head* Pectoral l 



