TILAPIA. 227 



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

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

 27-29 jgijy; lateral lines jg^j- 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 

 black 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 tnillim. 



Upper Congo. — Types in Congo Museum, Tervueren. 

 1-6. Types. Luluaburg. Rev. P. Callewaert (C). 



61. TILAPIA STORMSTI. 



Bouleng. Proc. Zool. Soc. 1902, i. p. 270, pi. x\x. fig. 2 ; Pellegr. Mem. Soc. 



Zool. France, xvi. 1904. p. 339, 



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

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



Fig. MO. 



TUapia stormsii. 

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



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

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

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

 praeorbital ; mouth about §• width of head, extending to between nostril 

 and eye ; teeth in 4 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-XVI1 9 ; last spine longest, about f length 

 of head; longest soft rays about 1, length of head. Anal III 7; third 



2 



