36 Mr. C. T, Regan — Classification of 



G. Mouth terrniiml. U. XVl-XVIII 10-15. A. Ill 8-10. Scales 

 small, 6') to 90. 



Teeth small, in 4 or o series, cuspidate in the 



vouiiir, conical in the adult 16. Bouhngerochromia. 



Teetli large, uniserial, stout, with a small cusp 



on each side superiorly 17. Perissodus. 



III. Articular surface for upper pharyngfeals formed by parasphenoid 

 in the middle and basioccipital at the sides. 



A. Scales large ; 3 anal spines ; teeth small or moderate. 



1. One or two lateral lines ; outermost pelvic ray longest. 



a. Bones of head with small canals ending in small pores. 



a. Inferior apophyses of third vertebra well developed. 



An outer series of bicuspid or conical teeth 



and one or more inner series of smaller 



tricuspid or conical teeth ; pharyngeal 



teeth bicuspid or conical 18. Haplochromis. 



An outer series of small conical teeth, those of 



lower jaw directed outwards, and one or 



more inner series of minute conical teeth; 



lower pharyngeal teeth small, slender. ... 19. Ectodus. 

 An outer series of small conical teeth, those of 



lower jaw directed more or less outwards ; 



middle teeth of posterior part of lower 



pharyngeal enlarged and obtuse 20. Callochromis. 



(i. Inferior apophyses of third vertebra vestigial ; an 

 outer series of small conical teeth and 1 or 2 inner 

 series of minute teeth 21. Leptochromis. 



b. Frontals, nasals, pra^orbitals, lower jaw, and prnsoperculum 

 with large channels with wide openings. 



Suborbitals narrow ; 2 lateral lines 22. Aulonoaanus. 



Suborbitals broad, deeply excavated ; one short 



lateral lino 23. Trematocara. 



2. Two lateral lines ; innermost pelvic ray longest. 



Outer teeth of lower jaw erect 24. Stappersia. 



Outer teeth of lower jaw directed outwards . . 26. Enantiojma. 



3. Three lateral lines. 



Outermost pelvic ray longest 2G. Ormiimatotria. 



Innermost pelvic ray longest 27. Ximotilapia. 



B. Scales small ; 3 anal spines. 



1. Teeth in 2 to 5 series, conical. 



^louth moderate ; teeth small 28. llrvtihates. 



Mdutli large ; teeth strong 2i). JUithijlxites. 



2. Teeth uniserial. 



a. Teclli conical, curved 30. Jlaplotaxodon. 



b. Teeth compreased, efrongly curved. 



Tt'cth small, close-set 31. XeunchniDng. 



Teeth large, set well apart 31'. J'lecodus. 



