CicliUd Fishes of the Oemis Tylocliromis. 167 



2. Ti/Iochromis JateraUs. 



Pebnatochromis lateralis, Buulenjif. Proc. Zool. Soc. 1898, p. 148. 

 Pelmatochromis lepidurus, Pellegr. Bull. Musj Paris, 1900, p. 275. 

 Felmatochfumis lateralis (part.), Bouleng. Cat. Afr. Fish. iii. p. 885, 

 fig. 260 (1915). 



Depth of body 2 to 2^ in the length, length of head 2f to 

 3^. Diameter of eye 3 to 4 in lengtli of head ; iuterorbital 

 width 3^ to 3|. Teeth small; maxillary not extending to 

 below eye; cheek with 3 or 4 series of scales; 17 or 18 gill- 

 rakers on lower part o£ anterior arch. Lower pharyngeal 

 ^with enlarged rounded teeth in a triangular area, the anterior 

 angle of which is in the middle of the length of the denti- 

 gerous part of the plate. Dorsal XIV-XV 12-15 ; last 

 spine ^ or a little less than \ length of head. Anal III 7-8 ; 

 third spine from nearly \ to § length of head. Pectoral 

 longer than head, reaching origin of anal. Caudal slightly 

 emarginate. Caudal peduncle about as long as deep. 32 to 

 35 scales in a longitudinal series, 5 or 6 between first dorsal 

 spine and lateral line, 2 between lateral lines. 



Olivaceous, with or without dark cross-bars ; dorsal fin 

 usually with series of dark spots. 



Congo. 



Six specimens, including the type of the species, 110- 

 220 mm. in total length, from Monsembe, Bolobo, Dolo, and 

 Stanley Falls. 



3. I'ylochromis jentinki. 



Pebnatochromis jentinki (Steiud., 1894), Bouleng. Cat. Afr. Fish. iii. 

 p. 383, fig. 259 (1915). 



Pharyngeal dentition as in T. lateralis, from which it is 

 distinguished especially by the fewer gill-rakers (12-15), the 

 smaller scales (40-45), and by having three series of scales 

 instead of two between the upper lateral line and the anterior 

 fart of the lower. Dorsal XIII-XV 16-17. Anal III 8-i>. 

 J Total length 290 mm. 

 ' Gambia to Liberia. 



4. Tylochromis hangwelensis, sp. n. 



Pebnatochromis lateralis (part.), Boiilen|r. Cat. Afr. Fish, iii, p. 885 

 (1916). 



Depth of body 2 to 2\ in the length, length of head 3 to 3^. 

 Snout as long as postorbital part of head ; diameter of eye 4 

 to 4^ in length of head, less than praiorbital depth ; inter- 

 orbital width 3 to 3^ in length of head ; maxillary not 

 extending to below eye ; outer teeth moderately strong; three 

 series of scales on cheek ; 14 ur 15 gill-rakers on lower part 



