252 Ml. C. T. Regan — Classification of 



5. Pelmatochromis, Steind., 1894 

 (type P. buettikoferi, Steiud.). 



Articular surface for upper pliaryngeals formed by para- 

 splieuoid only. Vertebrae 25 to 27 ; third with apophyses 

 which unite below. Mouth terminal ; lower jaw not or l)ut 

 little projecting ; teeth conical, in 2 or more series. Scales 

 cycloid. Dorsal XIII-XVIII 7-12. Anal 111 6-9. 



Congo and West Africa. 



In addition to species 4 to 21 of Bouleuger's Catalogue, 

 this genus includes : — 



Paratilapia cerasogaster, Bouleug. 



,, dorsalis, Pellegr. 



,, corbali, Bouleng. 



„ thomasi, BouJeng. 



„ longipinnis, Nichols & Griscom (? = P. nigro- 



fasciatus). 

 ? Hemichromis schwebischi, Sauv. 



I suspect that the last may be a Pelmatochromis related to 

 P. yuentlieri. 



6. Nannochromis, Pellegr., 1904. 



Scarcely distinct from Pelmatochromis. 

 Three species from the Congo. 



7. Heterochromis, gen. nov. 

 (type Paratilapia multidens, Pellegr.) . 



Pharyngeal apophysis formed by parasphenoid. Occipital 

 crest very strong, extending forward in advance of inter- 

 orbital region. Jaws with broad bands of small conical 

 teeth. Pharyngeal teeth conical, those in the middle strong 

 and blunt. Scales more or less distinctly denticulate, large 

 (29-30). Dorsal XIV 14-15. Anal III 8-9. 



A single species from the Congo, which is well dis- 

 tinguished from all otlier African Ciciilidae by the dentition, 

 the shape of the head, the scaly soft dorsal and anal fins, 

 and the separation of the lateral lines by three rows of 

 scales. Paratilapia wenodon, Nichols & Griscom, is a 

 synonym. 



