the Family Cichliilw. 253 



8. Tylochromis, Regan, 1920 

 (type Pelmalochromis Jendnki, Steind.). 



One «j)ccM('s from Tanganvika and seven from the Congo 

 and West Africa {rf. llegau, Ann. & Mag. N. 11. (9) v. 

 1920, p. 163). 



9. Hemiciiromis, Peters, 1857 

 (type //. fasciatus, Peters). 



Tliis genus, with 2 species from Africa, differs slightly 

 from Htiplochromis in the dentition and in the structure of 

 the maxillary. 



10. Haplochromis, Hilgcnd., 1888 

 (type H. obliquidens, llilgend.). 



Regan.P. Z.S. 1922, p. IGO. 



Numerous species in Victoria and Nyassa; the species 

 not peculiar to the Great Lakes all belong to the subgenus 

 C'tenoc/iromis, Pfelfer, with an outer series of bicusi)id 

 or conical teeth and one or more inner scries of tricuspid or 

 couical teeth. They may be arranged as follows : — 



I. S. Africa (Zambesi and southwards). 



A. Soft dorsal with 12-15 rays; pharyngeal teeth obtusely conical. 



1. Depth of proeorbilal not greater than diameter of eye. 

 Scales on chest ratlier small ; 6 scales between 



pectoral and pelvic fins 1. giardi. 



Scales on chest larger ; 3 or 4 between pectoral and 



pelvic fins 2. yibhiceps. 



2. Depth of prseorbital a little greater than diameter of eye. 



3. SDiithii. 



3. Depth of praeorbital much greater than diameter of eye. 



4. fredcrici. 



B. Soft dorsal with 8 to 12 rays. 



1. or 7 series of scales on cheek. 



Caudal truncate 5. jidler. 



Caudal rounded 6. humilis. 



2, 3 to 5 series of scales on cheek. 



a. Maxillary extending to between nostril and eye ; caudal 



peduncle longer than deep 7. acuticeps. 



b. Maxillary about reaching vertical from anterior edge of eye. 

 a. 32 scales in a longitudinal series; caudal peduncle longer 



than deep. 



Pharyngeal teeth of 2 median series strong, sub- 

 conical ; rest small, compressed, hooked 8. muUiocellattis, 



Lower pharyngeal with a group of stout, blunt 



teetii 9. darluiffi. 



