TILAPIA. 



LMO 



80. TILAPIA JOHNSTONII. 



ChroDiis JoJindoiii, Giiiitli. Pfoc. Zool. Soc. \S^)'.], p. G22, pi. liv. fig. A. 



C/ironiis si(hocular/'s, [nirfc., Giinth. t. c. p. ()2l, fig. 13. 



T'dapia jolinstoiil, part., Boulcng. Tr. Zool. Soc. xv. 1898, p. 4, and Pioc. Zool. Soc. 



1899, p. i;k). 



A.statofihqj'ta jo/iiistoiti, part., Pellegr. Mem. Soc. Zool. France, xvi. 1904, p. 30!). 



Depth of body nearly equal to length of head, 2f to 3| times in totil 

 length. Hfad twice as long as broad ; snout rounded, with straight 

 ujiper profile, as long as broad, as long as postocular part of head ; eye 

 3h to 4 times in length of head, equal to or somewhat greater than 

 interorbital width, exceeding praeorbital depth; mouth rather small, 

 f width of head, extending to between nostril and eye ; teeth in 4 or -j 



Tilapla joJinstonii. 

 Type, after Giiuther (P. Z. S. 1S93). 



Series, outer moderately large and bicuspid, 40 to 50 in upper jaw, 

 separated by a considerable interspace from the others, which are very 

 minute and mostly conical; 3 or 4 series of scales on the cheek, width of 

 scaly part less than diameter of eye. Gill-rakers bhort, 11 or 12 on lower 

 part of anterior arch. Dorsal XV-XVl 10-11 ; last spine longest, | to h 

 length of head, J to | longest soft rays. Anal III 8-0 ; third spine 

 a little shorter than longest dorsal. Pectoral as long as or a little 

 shorter than head, rcacliing vertical of origin of anal. Ventral reaching 

 vent or anal. Caudal slightly notched, with rounded corners. Caudal 

 pedu\icle 1^ to 1^> tinu's as long as deep. Scales distinctly denticulate, 

 32-33 -,-|~"[., ; lateral lines ''[^ ~^l'.. Pale olive, with G or 7 more or less 



