284 CiCHLID.E. 



10. HAPL0CHR0MIS. 



Haplochromis, Pfeff. Sitzb. Ges. naturf. Fr. Berlin, 1888, p. 76 ; Bouleng. Fishes 



Nile, p. 495 (1907). 

 Ctenochromis, part., Pfeff. Jahrb. Hamb. Wiss. Anst. x. 1893, p. 149, and Thierw 



O.-Afr., Fische, p. 14 (1896). 

 Paratilapia, part., Bouleng. Proc. Zool. Soc. 1898, p. 137, and Poiss. Bass. Congo, 



p. 412 (1901). 

 Tilapia, part., Bouleng. Proc. Zool. Soc. 1899, p. 105, and Poiss. Bass. Congo, 



p. 452. 

 Astatotilapia, Pellegr. Mem. Soc. Zool. France, xvi. 1904, p. 299. 

 Astatoreochromis, Pellegr. t. c. p. 384. 



Body short or moderately elongate ; scales ctenoid ; two incomplete 

 lateral lines. Teeth in 2 or more series, the outer conical or bicuspid, 

 the inner usually tricuspid ; maxillary bone exposed at the end when 

 the mouth is closed. Dorsal fin with 13 to 19 spines, anal with 3 to 6. 

 Vertebra? 28-32 *. 



Africa and Syria. 



Under this genus are grouped a number of allied species which vary 

 to such an extent in their dentition that some specimens might be 

 referred to Tilapia and others to Paratilapia. 



Synopsis of the Species. 



I. Caudal fin truncate or slightly emarginate. 



A. Teeth in 4 to 7 series; caudal peduncle not or but slightly longer than 

 deep ; pectoral fin as long as head or a little shorter. 

 1. Mouth not extending to below anterior border of eye ; 11 or 12 giil- 

 rakers on lower part of anterior arch. 

 I). XVI 10-11 ; A. Ill C-10 ; Sc. 33-36 ^ ; 

 lower jaw slightly projecting ; depth of body 

 2| to 3 times in total length 1. II. Ihinpstonii, Grthr.. p 28C,. 



* Vertebra) : — 



18+15=28. II. moffati. 



13+17 = 30. H. angustifrons. 



14+15 = 29. II. desfontainesii, II. alluaudi. 



14+16 = 30. H. desfontainesii, II. alluaudi, II. moeruensis. 



14 + 17 = 31. II. ishmaeli. 



15 + 16 = 31. H. desfontainesii. II. ishmaeli, II. nuchisquamulat'is, 



H. venuslits. 

 15 + 17=32. //. ishmaeli. 



