TILAPIA. 



183 



Anal III 10. Pectoral as long as head, reaching vertical of origin of 

 anal. Ventral reaching anal. Cautlal densely scaled, emarginate, 

 pointed above, rounded beneath. Caudal peduncle much deeper than 

 long. Scales cycloid, 29 ^| ; lateral lines ^. Brown above, golden 

 beneath ; a dark opercular spot ; fins uniform greyish. 



Total length 203 millim. 



Upper Congo (Nganchou). — Type in Paris Museum. 



23. TILAPTA SQUAMIPINNJS. 



Chromis sqnamipinnis, Giinth. Proc. Zool. Soc. 18G4, p. .Til, ami l>ii)?>, p. 021, 



pi. liii. 

 Tilapia sqitamipinnis, Bouleng. Tr. Zool. Soc. xv. 1898, p. 4, and Proc. Zool. Soc. 



1899, p. 177 ; Pellegr. Mem. Soc. Zool. France, xvi. 1904, p. 318. 



Depth of body 2J to 2§ times in total length, length of head 2§ to 

 3 times. Head If to 2 times as long as broad ; snout rounded, with 

 straight or convex upper profile, about f as long as broad, f to ^ 

 postocular part of head ; eye 3 (young) to 5| times in length of head, 

 1^ (young) to 2f times in interorbital width, equal to pra3orbital depth 



Fig. 118. 



Tilapia squamipinnis. 

 Type, after Gunther (P. Z. S. 1893). |. 



in adult; mouth moderate, J to | width of head, extending to between 

 nostril and eye; teeth in 4 (young) to 7 series*, 50 (young) to 110 in 



* In one of the specimens received from Capt. Klioades, all the outer teeth are conical, 

 without secondary cusps. 



