TJLAPIA. 



185 



Gill-rakers short, 12 to 15 on lower part of anterior arch. Dorsal XV- 

 XVI (rarely XVII) 9-11 *; spines subequal fiom the sixth or seventh, 

 or last longest, § to not quite ^ length of head ; longest soft rays jj- to | 

 length of head. Anal III 8-9 ; third spine f to f length of head. 

 Pectoral as long as or a little longer than head, extending to vertical of 

 origin of anal or a little beyond. Vertical reaching vent or anal, or 

 not so far. Caudal truncate or feebly but very distinctly emarginate. 

 Caudal peduncle deeper than long. Scales cycloid or very feebly 

 denticulate, 27-31 {£13; lateral lines £15. Brown, grey, or olive, with 



Fig. 119. 



Tilapia dolloi. 

 Type(A.M.C). f. 



or without small black spots, belly white ; lower half of head often 

 black, or with ink-black spots ; young with ill-defined narrow dark 

 bars ; pectorals white, other fins grey or black, soft dorsal often with 

 round light spots. 



Total length 155 millim. 



Spanish Guinea to Congo. — Types in Congo Museum, Tervueren. 



1. Hgr. Benito R., Spanish Guinea. G. L. Bates, Esq. (C). 



2. Ad. Sette Cama, Gaboon. 



3-5. Ad., hgr., Landana, Portug. Congo. Dr. Jackson (C.) ; Hon. W. 



&■ 



Rothschild (P.). 



14 in one specimen from Ckiloar.yo. 



