TILAPIA. 145 



]). XIV-XV 14-16 ; A. Ill 10-11 ; Sc. 29- 



32 Vf^rl ; 11-12 gill-rakers ; depth ol; 

 body 2 to 2 j times in total length ; caudal 



rounded, scaly all over in the adult . . .49. 7\ buettiko/eri, Rnhr., \). 214:. 



I II. Scales with more or less distinctly denticulate edge. 

 A. Caudal rounded or truncate, not at all emaro'inato. 



1. Dorsal with 14 or 1.5 spines ; eye 3 to 4 times in length of head ; depth 



of body 2^ to 3 times in total length; caudal rounded or rounded- 

 subtruncate. 



a. Caudal peduncle not or but little longer than deep. 



«. 3 to .5 series of scales on the cheek. 



* Pectoral shorter than head. 

 D. XIV-XV 10-11 ; A. Ill G-7 ; Sc. 29- 



30 '-jTT ; caudal densely scaled at the base . .50. T. fasciata, Perugia, p. 215. 

 D. XIV-XV 9-11 ; A. Ill 8-9 ; Sc. 28- 



31 ^*; mouth to below anterior border 

 oil eye or a little beyond; teeth in 4 to 6 



si^ries, 50-70 in outer series of upper jaw. 51. T. hurtoni, Gthr., p. 217. 

 D. XIV-XV 10-11; A. Ill 8-9; Sc. 30- 



;')2 -^ ; lower jaw sliglitly projecting ; 



mouth not extending to below anterior 



border of eye ; teeth in 2 series, about 50 



in outer serie.'? of upper jaw 52. 7\ acuticeps, Stdr., p. 218. 



D. XV 9-10; A. Ill 8-9; Sc. 29-31 gjj ; 



mouth extending to below anterior border 



of eye ; teeth in 4 series, 40-42 in outer 



series of upper jaw 53. T. siopinertoni, Blgr., i>. 21d. 



*'* Pectoral as long as head. [p- 220. 



D. XIV 10; A. Ill 9 ; So. 31 ?| 54. T. adolpM-frulericI, Blgr., 



/3. 6 series of scales on the cheek. 



D. XV 14 ; A. Ill 9; Sc. 34 g 55. T. giardi, Pellegr., p. 221. 



h. Caudal peduncle much longer than deep. [p- 222. 



D. XIV-XV 8-9 ; A. Ill 8 ; Sc. 28 ^ • • • 56. T. fiiellehornii, Ililg. & Papp., 



2. Dorsal with 15 to 17 spines (rarely 14) ; eve 4 to 4^ times in length of 



head in adult ; depth of body 2f to 3J times in total length. 

 a. 7-10 gill-rakers on lower part of anterior arch ; caudal rounded. 

 D. XIV-XVI 8-10 ; A. Ill 7-8 ; Sc. 30- 



33 ^3-; teeth in 3 to 5 series; snout 



shorter than postocular part of head . . 57. T. mlUpiera, Ctlu-., p. 222. 

 VOL. 111. ^ 



