TiLAPIA. 145 



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

 32 ; i|| ; 11-12 gill-rakers ; depth of 

 body 2 to 2\ times in total length ; caudal 

 rounded, scaly all over in the adult. . . 49. T. buettikoferi, Hubr., p. 214. 



II. Scales with more or less distinctly denticulate edge. 

 A. Caudal rounded or truncate, not at all emarginate. 



1. Dorsal with 14 or 15 spines ; eye 3 to 4 times in length of head ; depth 



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

 subtruncate. 



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



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



* Pectoral shorter than head. 

 D. XIV-XV 10-11 ; A. Ill 6-7 ; Sc. 29- 



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

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



31 -ji- ; mouth to below anterior border 

 of eye or a little beyond ; teeth in 4 to 



series, 50-70 in outer series of upper jaw. 51. T. burtoni, Gthr., p. 217. 

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



32 -si. ; lower jaw slightly projecting ; 

 mouth not extending to below anterior 

 border of eye ; teeth in 2 series, about 50 



in outer series of upper jaw 52. T. acuticeps, Stdr., p. 218. 



D. XV 9-10 ; A. Ill 8-9 ; Sc. 29-31 f^ ■ 

 mouth extending to below anterior border 

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



series of upper jaw 53. T. su-ynnertoni, Blgr., p. 219. 



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



D. XIV 10; A. Ill 9 ; Sc. 31 f| 54. T. adolphi-fr, derici, Blgr., 



/3. 6 series of scales on the cheek. 

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



b. Caudal peduncle much longer than deep. [p. 222. 

 D. XIV-XV 8-9 ; A. Ill 8 ; Sc. 28 ^ . . . 5(5. T. fuellebornii, Hilg. & Papp., 



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



head in adult ; depth of body 2§ 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 vf-io ; teeth in 3 to 5 series; snout 



shorter than postocular part of head . . 57. T. calliptera, Gthr., p. 222. 

 VOL. III. L 



