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, f to not quite J length of head ; longest soft rays f to J 

 length of head. Anal 111 8-9; third spine ^ to | 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. 

 Caudtil peduncle deeper than long. Scales cycloid or very feebly 

 denticulate, 27-31 ^y~^^; latenl lines [jEj^- Brown, grey, or olive, with 



Fig. 119. 



Tilaj)ia 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 U., 8pani.sli Guinea. O. L. Batei>, Esq. (C). 



•2. Ad. Sette Cainu, Gaboon. 



3-5. Ad., hgr., 

 k yg. 



Landana, Portug. Congo. 



Dr. Jackson (C.) ; Hon. W. 

 llothschild (P.). 



* 11 iu oue specimen froui Cbilounyo. 



