138 • Mr. G. A. Boulenger on 



XV. — Descriptions of Three new African Cichlid Fishes of 

 the Genus Tilapia, preserved in the British Museum. By 

 G. A. Boulenger, F.R.S. 



(Published by permission of the Trustees of the British Museum.) 



Tilapia hafuensis. 



Deptli of body 2j times in total lengtli, lengtli of Iiead 3 

 times. Head If times as long as broad ; snout rounded, 

 with straight upper profile, slig'litly broader than long, a 

 little shorter than postocular part of head ; eye 5^ times in 

 length of head, | interorbital width, a little less than prse- 

 orbital depth ; mouth rather large, | width of head, extending 

 to between nostril and eye ; teeth in 8 series, 110 in outer 

 series of upper jaw; 4 series of scales on the cheek, width o£ 

 scaly part a little greater than diameter of eye. Gill-rakers 

 7noderate, 25 on lower part of anterior arch. Dorsal XVII 13 ; 

 last spine longest, | length of head ; longest soft ray | length 

 of head. Anal III 11 ; third spine not quite ^ length of 

 head. Pectoral slightly longer than head, reaching vertical 

 of origin of anal. Ventral reaching between vent and 

 anal. Caudal rounded. Caudal peduncle as long as deep. 

 Scales cycloid, 33 ^ ; lateral lines f|^. Dark brown above, 

 wliiti4i beneath ; a black opercular spot and three ill-defined 

 black spots on the side below upper lateral line ; soft dorsal 

 and anal fins with round light spots between the rays. 



Total length 360 mm. 



A single specimen from the Kafue Kiver, N.W. Rhodesia, 

 presented by Mr. T. Codrington. 



Distinguished from T. mossamhica by the presence of four 

 series of scales on the cheek and more numerous gill-rakers. 



Tilapia eduardiana. 



Depth of body equal to length of head, 2| to 2| times in 

 total length. Head nearly twice as long as broad ; snout 

 rounded, with straight or convex upper profile, much broader 

 than long (1^ to 1|), i to g postocular part cf head; eye 3^ 

 to 3| times in length of head, 1^ to 1^ times in interorbital 

 widtii, much longer than pra3orbital depth; mouth moderate, 

 ? to I width of head, extending to between nostril and eye ; 

 teeth in 3 series, 66 to 88 in outer series of upper jaw ; 2 or 

 3 series of scales on the cheek, width of scaly part -| to | 

 diameter of eye. Gill-rakers short, 20 to 23 on lower part 



