36 Mr. C. T. Regan—Classijication of 
G. Mouth terminal. D.XVI-XVIII 10-15. A.IIT 8-10. Scales 
small, 65 to 90. 
Teeth small, in 4 or 5 series, cuspidate in the 
young, conical in the adult ............ 16. Boulengerochromis. 
Teeth large, uniserial, stout, with a small cusp 
on each side superiorly ...... avai ie ioe Bie 17. Perissodus, 
III. Articular surface for upper pharyngeals 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. 
B. 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, preorbitals, lower jaw, and preoperculum 
with large channels with wide openings. 
Suborbitals narrow; 2 lateral lines.......... 22. Aulonocranus. 
Suborbitals broad, deeply excavated ; one short 
Apheval wine ie, as assis as we RAE re ie 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 .. 25. Enantiopus. 
8. Three lateral lines. 
Outermost pelvic ray longest ..........4. .. 26. Grammatotria. 
Innermost pelvie ray longest.........+..000. 27, Xenotilapia. 
B, Scales small; 3 anal spines. 
1. Teeth in 2 to 5 series, conical. 
Mouth moderate; teeth small .............. 28. Hemibates. 
Mouth large ; teeth strong ...... tage Banas 29. Bathybates. 
2. Teeth uniserial. 
a. Teeth conical, curved ......... . 80, Haplotaxodon. 
6, Teeth compressed, strongly curved. 
Teeth small, close-set ........0.005 Teen un 31, Xenochromis. 
Teeth large, set well apart ...... coe ae meee 32. Plecodus. 
