TILAPIA. U7 



D. XV-XVI 8-10 ; A. Ill 8-10 ; Sc. 29- 



^3 -—^ ; 8-9 gill-rukei-s ; eye 3 to 3^ 



times in length of head ; caudal rounded . (38. T. nubila, Blgr., p. 235. 

 D. XV-XVI 8-9 ; A. Ill 8 ; Sc. 30 1 ; 10 



gill-nikers ; e^e somewhat more than 



3 times in length of head ; pectoral 



nearly as long as head, reaching origin 



of anal GO. T. pedomUs, Tt^^ff , p. 2:\~. 



D. XV-XVI 9-10 ; A. Ill 9 ; Sc. 32- 



33 ^qzYi ' 10-12 gill-rukors ; eye 3 times 



in length of head ; caudal truncate ; 



pectoral shorter tlian head 70. 7\ uiacrops, B]gv., ii. 21)8 . 



D. XV-XVI 8-10; A. Ill 8-9 ; 8-9 gill- 

 rakers ; eye 2f to 3 times in length of 



head ; caudal truncate 71. 7", martini, Blgr., p. 239. 



/8. Teeth in 5 to 8 series. 

 D. XV-XVI 6-10 ; A. Ill 9-10; eye 3 times 



in length of head ; mouth extending to 



below eye ; caudal rounded-subtruncate . 72. T, hayoni, Blgr., p. 240. 

 D. XV-XVI 9-10 ; A. Ill 9-10; eye 3i to3i 



times in length of head ; mouth not ex- 

 tending to below eye ; caudal truncate . 73. T. nigricans, Blgr., p. 241. 

 D. XV-XVI 9-10 ; A. Ill 8-9 ; eye 3^ to 3^ 



times in length of head; mouth extending 



to below anterior border of eye ; 60-80 



teeth in outer series of upper jaw ; caudal 



ronnded 74. T. simotes, Blgr., p. 242. 



D. XVII 9 ; A. Ill 8 ; eye 3^ times in lenglh 



of head ; mouth extending to below ante- 

 rior border of eye ; 40 teeth in outer series 



of upper jaw; caudal rounded . . . .75. T. Uvingdonii, 'R\gr., \). 2i:?,. 



4. Dorsal with 18 or 19 spines ; teeth in 4 to 6 series. 



a. Caudal densely scaled, at least at the base ; third anal spine not 

 longer than longest dorsal. 

 D. XVIII 8 ; A. Ill 8 ; Sc. 31 ^^ ; depth of 

 body 2| times in total length ; 5 or 



series of scales on the cheek 76. T. zebra, Blgr., p. 244. 



D. XIX 6 ; A. HI 6 ; Sc. 34 ^ ; depth of 

 body 3§ times in total length ; 3 aeries of 

 scales on the cheek 77. 7'. ai(rai'a, Blgr., p, 2-l(; 



