506 Annals of the South African Museum. 



of upper jaw ; 3 or 4 series of scales on the cheek, width of scaly part 

 nearly equal to diameter of eye. Grill-rakers short, 7 to 9 on lower 

 part of anterior arch. 



Dorsal xiii-xv 9-1 1 ; last spine longest, -f- to ^ length of head ; 

 longest soft rays | to f. Anal iii 8-9 ; 3rd spine as long as last dorsal. 

 Pectoral shorter than head, not extending to vertical of origin of anal. 

 Ventral reaching vent or anal. Caudal rounded. Caudal peduncle as 



long as deep. Scales cycloid or very finely denticulate, 27-30 -~ ; 



lateral lines 1 '^ ^5. 



Olive-brown, with or without faint darker vertical bars ; a black 

 opercular spot; dorsal and anal edged with black, and with dark and 

 light spots, or with black streaks ; outer ventral rays black or 

 blackish. 



Total length 100 millim. 



Angola, Bechuanaland, Rhodesia, Katanga, Lake Bangwelu." 



21. *TlLAPIA WOOSNAMI, Blgr. 



Bouleng., Trans. Zool. Soc., xviii, 1911, p. 417, pi. xliii, fig. 2 ; and 

 Freshw. Fish. Africa, iii, p. 212, fig. 137 (1915). 



."'' --. '; .'V.. 



"-__^i''' 



-- ,^/W-i-' 1 



w 



FIG. 132. Tilapia woosnami. Type. |. 



"Depth of body 2f times in total length, length of head 3 times. 

 Head twice as long as broad ; snout obtusely pointed, as long as post, 

 orbital part of head, as long as broad, with slightly convex upper 

 profile ; eye 4^ times in length of head, equal to width of interorbital 

 region or depth of preorbital ; mouth moderate, f width of head- 

 extending to between nostril and eye ; teeth in outer row rather large, 



