TILAPIA. 



151 



2. TILAPIA SHIRANA. 

 Oreochromis sMranus, Bouleng. P.oc. Zool. Soc, 1896, p. 916, fig. ; Pellegr. Me.n. 

 teoc. Zool. France, xvi. 1904, p. 355. 



Tilapia Mrana, Bouieng. T.-. Zool. Soc. x.. 1898, p. 4, and Proc. Zool. Soc. 1899, 

 p. 111. ' 



Depth of body 2 to 2| times in total length, length of head 3 times. 

 Head 1^ to 1| times as long as broad ; snout rounded, with straight or 



Fig. 98, 



Head of Tilapia shirana. 

 Type (P. Z. S. 1896). 



slightly concave upper profile, a little broader than long, f to f post- 

 ocular pait of head ; eye 4 to 5 times in length of head, 1| to 2 times 

 in interorbital width, equal to or a little less than prseoibital depth ; 

 mouth moderate, f to § width of head, extending to between nostril and 

 eye ; teeth in 5 to 8 series, 70 to 100 in outer series of upper jaw; 

 2 or 3 series of scales on the cheek, width of scaly part not greater than 



