TILAPIA. 



153 



cycloid, 32^; lateral lines -}g|. Greenish black; a black opercular 

 spot; hns blackish, soft dorsal and caudal ^yith more or less distinct 

 round light spots between the rays. 



Total length 250 millim. 



Athi liiver System, British East Africa. 

 1-1^ Types. Pools on Kibwesi R. 



Prof. J. W. Gregory (P.). 



Fig. 99. 



Tilwpia iiiyra. 

 Type, after Giinther (l. c). ^. 



4. TILAPIA KAFUEXSIS. 

 Bouleng. Ann. <fc Mag. X. H. (8) x. 1912, p. US. 



Depth of body '2^ times in total length, length of head 3 times. 

 Head 1| times* as long as broad; snout rounded, with straight u|)per 

 ])rofile, slightly broader than long, a little shorter than postocular part 

 of head ; eye 5^ times in length of head, j interorbital width, a little 

 less than proeorbital depth; mouth rather large, -|- width of hend, 

 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 of scaly part 

 a little greater than diameter of eye. Gill-rakers moderate, 25 on lower 

 part of anterior arch. Dorsal XVII 13 ; last spine longest, f length of 

 head ; longest soft ray § length of head. Anal III 11 ; third spine not 

 quite ^ length of head. Pectoral sliglitly longer than head, reaching 



