TILAPIA. 



227 



from anal. Ventral reaching vent. - Caudal rounded. Caudal peduncle 

 as long as deep or a little deeper than long. Scales feebly denticulate, 



— 2— S . 18— '^1 



27-29 jqzyi', lateral lines 20ij2- Brownish above, white beneath, uniform 

 or with 7 or 8 rather indistinct dark cross-bands ; a blackish opercular 

 spot ; two or three dark streaks across the top of the head and another, 

 oblique, from the anterior third of the eye to the mouth ; usually a 

 bhick spot on the chin ; spinous dorsal greyish with round light spots; 

 soft dorsal yellow with oblique blackish bars ; anal yellow, blackish 

 towards the edge ; caudal yellow with small round blackish spots. 



Total length 105 millira. 



Upper Congo. — Types in Congo Museum, Tervueren. 

 l-G. Types. Lnluaburg. Rev. P. Callewaert (C). 



Gl. TILAPIA STORMSII. 



Bonlcng. Proc. Zool. Soc. 1902, i. p. 270, pi. xxx. fig. 2 ; Pellegr. Mem. Soc. 

 Zool. France, xvi. 1D04, p. 339. 



Depth of body equal to length of head, 3 to 3 J times in total length. 

 Head twice as long as broad ; snout rather pointed, with straight or 



7m <r. 140. 





TiUtj^iin utonnfiii. 

 Type (P. Z. S. 1902). |. 



slightly convex upper profile, as long as broad, as long as postocular 

 part of head, 1^ to If times diameter of eye, which is 3J (young) to 

 4^ times in length of head and equals interorbital width or depth of 

 pneorbital; mouth about | width of head, extending to between nostril 

 and eye ; teeth in 'i to 7 series, outer rather large and about 40 to 50 in 

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

 equal to diameter of eye. Gill-rakers short, 10-12 on lower part of 

 anterior arch. Dorsal XVI-XVIl 9; last spine longest, about | length 

 of head; longest soft rays about h length of head. Anal III 7; tliird 



