492 Annals <>f I In- South African Museum. 



One specimen, 95 nun. in length, from Victoria Falls, Zambesi 

 River (Mr. J. W. So per). Bulawayo Museum. 



This species is also reported from Lake Galilee and Jordan ; Nile 

 system up to Blue Nile and Bahr-el-GTebel ; Senegal; Gambia; 

 Portuguese Guinea ; Lagos ; Niger ; ? Banzyville, Ubanghi. 



9. TlLAPIA ANDERSONII, Cast. 



Chromys andersonii, Cast eln., Mem. Poiss. Afr. Austr.,p. 14 (1861). 



Chromys cha/pmanii, Casteln, op. cit., p. 15. 



/ Chromys sparmanni (non A. Smith), Casteln., t.c., p. 12. 



Melanogenes microcephalus (non Bleek.), Sauvage, Bull. Soc. Zool. 

 France, 1884, p. 196, fig. 



Tilapia flavomarginata, Bouleng., Ann. Mus. Congo, Zool., i, p. 123, 

 pi. xlvi (1899), Poiss. Bass. Congo., p. 458 (1901), and Ann. and 

 Mag. Nat. Hist. (8), vi, 1910, p. 560 ; Pellegr., Mt'm. Soc. Zool. France, 

 xvi, 1904, p. 313, and Bull. Soc, Pliilom. (9), ix, 1907, p. 37, fig. 



Tilapia andersonii, Bouleug., Trans. Zool. Soc., xviii, 1911, p. 415, 

 and Freshw. Fish. Afr., iii, p. 171, fig. 110 (1915). 



Teeth in a band of four (young) to eight series. Depth of body 2^ 

 to 2^ times in total length excluding caudal, length of head 3 to 31 times. 

 Head 1^ to twice as long as broad ; snout rounded, with straight or 

 slightly convex upper profile, as broad as or a little broader than long, 

 a little shorter than postocular part of head ; eye 4f to 5J- times in 

 length of head, 2 to 2^ in interorbital width, equal to or a little less 

 than preorbital depth ; mouth moderate, -| to f width of head, extend- 

 ing to between nostril and eye ; 3 series of scales on the cheek, width 

 of scaly part not greater than diameter of eye. Gill-rakers moderately 

 long, 20 to 24 on lower part of anterior arch. 



Dorsal xvi 11-12 ; last spine longest, ~ to - length of head ; longest 

 soft rays to 1 length of head. Pectoral 1 to li times length of head, 

 reaching vertical of origin of anal or beyond. Ventral reaching to 

 vent or beyond. Anal iii 10-11 ; 3rd spine -| to -| length of head. 

 Caudal truncate or slightly emarginate ; caudal peduncle deeper than 



long. Scales cycloid, 30-32 ^ ; lateral lines *g- 



Colour (of preserved specimens) blackish brown, or dark uniform 

 brown, lighter beneath ; scales edged with whitish ; a dark opercular 

 spot ; vertical fins dark, with indistinct dark streaks on dorsal ; dorsal 

 faintly edged with yellowish white. 



One specimen, 268 mm. in length, from Zambesi River, about 3 

 miles above the Victoria Falls (Mr. F. W. Sykes). 



