48 Mr. C. T. Regan— Classification of 
25. Enantiopus, Bouleng., 1906 
(type #. melanogenys, Bouleng.). 
Dorsal XIJ-XV 13-17. Anal III 12-17. Innermost 
pelvic rays longest. Scales denticulate, large (37-44) ; two 
Jateral lines. Mouth terminal, very protractile ; teeth small, 
conical, in 2 series, outer of lower jaw directed outwards. 
Lower pharyngeal triangular ; teeth mostly slender, bicuspid, 
a few middle posterior teeth large and blunt. Occipital and 
parietal crests ending above posterior part of orbits; frontals 
with a median groove, widening forwards; mesethmoid well 
separated from vomer; articular surface for upper pharyn- 
geals formed by parasphenoid in the middle and basioccipital 
at the sides. Vertebre 38 (14424) ; inferior apopliyses of 
third meeting below. 
Tanganyika; 3 or 4 species. 
26. GRAMMATOTRIA, Bouleng., 1899 (type G. lemairii, 
Bouleng.). 
Dorsal XV 14-15. Anal IJI-IV 10-11. Outermost 
pelvic rays longest. Scales denticulate, large, about 40 in a 
lateral longitudinal series ; 3 lateral lines. Mouth terminal; 
end of maxillary exposed ; a series of conical teeth 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. Skeleton 
as in Callochromis macrops, except that the frontals partly 
roof over the median groove from each side and the inferior 
apophyses of the third vertebra are vestigial. Vertebree 
36 (144 22). 
Tanganyika ; a single species. 
27. XENOTILAPIA, Bouleng., 1899 (type X. sama, Bouleng.). 
Dorsal XJII-XV 12-14. Anal [III 7-12. Innermost 
pelvic rays longest. Scales denticulate, large (34-41) ; 3 
lateral lines. Mouth terminal, very protractile; maxillary 
very broad, concealed ; teeth small, conical, in 2 or 3 series, 
outer anterior teeth of lower jaw directed outwards. Lower 
pharyngeal triangular ; middle posterior teeth enlarged and 
obtuse. Skeleton nearly as in Callochromis macrops, but 
with the frontals tending to roof the median groove as in 
Grammatotria. Vertebree 34-35 (13-144 20-22). 
Tanganyika ; two species. 
