TILAPIA. 



183 



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

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

 })ointed above, rounded beneath. Caudal peduncle much deeper than 

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

 beneath ; a dark o[)ercular spot ; tins uniform greyish. 



Total length 203 niillim. 



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



23. TILAPIA SQUAMIPINNIS. 



Chromis sqnamipinnis, Giintli. Proc. Zool. Soc. 18G4, p. 311, niul 18*J3, p. (Jl^J, 



pi. liii. 

 Tilapia squamipinnis, Bouleng. Tr. Zool. Soc. xv. 1898, p. 4, and Proo. Zool. Soc. 



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



Depth of body 2J to 2f 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 -| as long as bro;id, | to | 

 postocular part of head ; eye 3 (young) to 5J times in length of h<>ad, 

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



I'ilojna squanii^nnnis. 

 Type, after Guuther (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 tlie specimeus received from Ctipt. Khoades, all the outer teeth are conical, 

 without secondary cusps. 



