The Fresh iru f, r /''/.<//* f tiouth Afrirn. 497 



Colour (of preserved specimens) brown or dark olive-brown above, 

 sometimes whitish on gular region, with or without 4 to 6 very 

 indistinct darker bars ; a dark opercular spot ; dorsal tin with oblique 

 dark streaks, with or without round light spots ; a more or less 

 indistinct large black spot at the base of anterior part of soft dorsal, 

 sometimes disappearing with age ; caudal sometimes with round light 

 spots, or with a dark network. 



One specimen, 260 mm. in length from Sabi River, Transvaal 

 (Major J. Stevenson Hamilton). 



Thirteen specimens, ranging from 54-95 mm. in length from Sabi 

 River, Transvaal (Major J. Stevenson Hamilton). 



One specimen, 23- mm. in length, from Manzemuteuto River, 

 Transvaal (Major J. Stevenson Hamilton). 



One specimen, 228 mm. in length, from Sabi River, Transvaal 

 (Major J. Stevenson Hamilton). 



One specimen, 180 .mm. in length, from Thabina River, Transvaal. 

 Pretoria Museum. 



One specimen, 254 mm. in length, from Kafue River, Rhodesia 

 (J. Hotchkiss). 



One specimen, 247 mm. in length, from Victoria Falls, Zambesi 

 River (GT. Arnold). Bulawayo Museum. 



One specimen, 109 mm. in length, from Lake Ngami (H. F. 

 Kirkham). 



A very widely distributed species, originally de><-ril>ed from the 

 Senegal (types in the Paris Museum), but now known from \Yf.-t 

 Africa as far south as Angola, from the Congo and Zaml,e-i s \sfenis, 

 the Transvaal, Zululand, and Bechuanaland. 



The specimens from the Gold Coast have IK en named T. discolor, 

 and those from the Gaboon T. lata and T. oij<'n.*i*, whilst the names 

 T. latifrons and T. rendalli apply to those from Lake Tanganyika and 

 the Zambesi respectively. Perhaps some of these names may have to 

 be revised when the state of our knowledge permits a division into 

 subspecies, an attempt at which the author of the ' Catalogue of 

 African Freshwater Fishes ' has regarded as premature. 



12. *TlLAPIA ARNOLDI, 11. Sp. 



Teeth in 3 rows ; those of outer row larger, slender, close-set, about 

 50 in upper jaw. Depth of body 2| times in total length excluding 

 caudal, length of head o times. Head 1^ times as long as broad; 

 snout short, with convex upper profile, 1.',- times as broad as long, 



35 



