48 Mr. C. T. Jiegan— Classification of 



25. Enantiopus, Bouleug., 1906 

 (type E. melanogenys, BuuU*ng.). 



Dorsal XII-XV 13-17. Anal III 12-17. Inivrmost 

 pelvic rays loi)«;t'st, kScaies cieiiticiilatf, lar^- (37-44); two 

 lateral lines. Mouth terminal, very proiraeiilo ; teeth small, 

 conical, in 2 series, outer of lower jaw directed outwards. 

 Lower pharyngeal triangular ; teoth mostly slender, bicusj)i(l, 

 a few middle posterior teeth large and blunt. Occijiital and 

 parietal crests ending above |)osterior jjart of orbits ; frontals 

 with a median groove, widening forwards; mesethmoid well 

 separated from vomer; articular surface for upper pharyn- 

 geals formed by paiasphenoid in the middle and basiocci|»ital 

 at the sides. Vertebiaj 38(14 + :^4j; interior apophyses of 

 third meeting below. 



Tanganyika; 3 or 4 species. 



2C. Grammatotkia, Bouleng., 1809 (type G. lemairii, 



Bouleng.). 



Dorsal XV 14-15. Anal III-IV 10-11. Outermost 

 ])elvic rays longest. Scales denliculate, large, about 40 in a 

 lateral longitudinal series ; 3 lateral lines. Mouth terminal; 

 end of maxillary exposed ; a series of conical teelh followed 

 by a narrow band of minute teeth ; outer anterior teeth of 

 lower jaw directed outwards. Lower pharyngeal triangular; 

 middle posterior teeth strongly enlarged and blunt. JSkeletoti 

 as in Callochroiiiis inacrops, except that the frontals paitly 

 roof over the median groove from each side and the ii.lcriur 

 }i|»ophyses of the third vertebra are vestigial. VerLtbrie 

 36(14 + 22). 



Tanganyika; a single species. 



27. Xenotilapia, Ijouleng., 181»9 (type X A?wm, Bouleng.). 



Dorsal XIII-XV 12-14. Anal III 7-12. Innermost 

 |)elvic rays longest. {Scales denticulate, large (34-41) ; 3 

 lateral lines. Mouth ternjinal, very protractile; maxillary 

 very broad, to)>cealed ; teeth small, conical, in 2 or 3 series, 

 outer anterior teeth of lower jaw directed outwards. Lower 

 j)haryngeal triangular ; middle posterior teeth enlarged and 

 obtuse. Skeleton nearly as in Callochromis tiiacrojis, but 

 with the frontals tending to roof the median groove as in 

 Uramvuitolria. VtMtebiie 34-35 (13-14 + 20-22). 



Tanganyika ; two species. 



