r,iG 



CJCIILID.E. 



:',:'>. TILAPIA BREVIMA^^US. 

 BoLileng. Ann. & Mug. X. H. (d) viii. 1911, p. 57. 



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

 Head twice as long as broad, upper profile convex ; snout as long as 

 broad, or a little broader, as long as or slightly longer than postorbitul 

 jiart of head ; eye 3 to 3^ times in length of head, equal to interorbital 

 width, and slightly exceeding depth of prseorbital; mouth extending to 

 between nostril and eye ; outer teeth moderately large, 50 to 60 in 

 upper jaw, followed after a rather wide interspace by 3 to 5 regular and 



Fig. 125. 



Tilapia hreviinanus. 

 Type. 



weli-separated series of smaller teeth ; 3 or 4 series of scales on the 

 cheek, the Aa^rtical diameter of the scaly part below the eye ^ to ^ dia- 

 meter of latter. Gill-rakers short, 13-15 on lower part of anterior arch. 

 Dorsal XVI (rarely XVII) 12 ; spines increasing in length to the last, 

 which measures about | length of head ; soft portion pointed, produced 

 hito a long filament in the male. Anal III 8-9 ; third spine as long as 

 lust dorsal. Pectcn-al f to | length of head, not reaching vertical of 

 origin of anal. Ventral produced into a long filament, reaching vent 

 or anal. Cau.lal truncate. Caudal peduncle nearly as long as deep. 



