1899.] ^TEtAN JFiSHBS OE THE FAMltT OICHLIDJ). l05 



11. Ebetmodtjs Blgr. 

 Tr. Z. S. XV. p. 16. 



1. Eeetmodus oyanostictus Blgr. 

 Tr. Z. S. XV. p. 16. 



Lake Tanganyika. 



12. Tkopheus Blgr. 

 Tr. Z. S. XV. p. 17. 



1. TUOPHEUS MOOBII Blgr. 

 Tr. Z. S. XV. p. 18. 



Lake Tanganyika. 



13. SiMOOHROMIS Blgr. 

 Tr. Z. S. XV. p. 19. 



1. SiMOOHROMIS DIAGRAMMA Grthr. 



Tr. Z, S. XV. p. 19. 

 Lake Tanganyika. 



14. TiLAPIA. 



Tilaj>ia, Smith, 111. Zool. S. Afr., Fish. (1840). 



Sarotherodon, Eiipp. Verz. Mus. Senck. iv. p. 21 (1852) ; Giinth. 

 Cat. iv. p. 273 (1862). 



Coptodon, Grervais, Bull. Soc. Agric. Herault, 1853, p. 81. 



Haligenes, Giinth. Proc. Zool. Soc. 1859, p. 471. 



CJironiis, Giinth. Cat. iv. p. 267. 



PtycJiochromis, Steind. Sitzb. Ak. Wien, Ixxxii. i. 1880, p. 248. 



Haplochromis, Hilgend. Sitzb. Ges. naturf. Fr. Berl. 1888, 

 p. 76. 



Oreochromis, Giinth. Proc. Zool. Soc. 1889, p. 70. 



Ctenochromis, Pfeff. Jahrb. Hamb. wiss. Aust. x. 1893, p. 149. 



Body short or moderately elongate ; scales cycloid or ctenoid. 

 Two or more series of small teeth in the jaws, all or greater part 

 notched or bi- or tricuspid. Maxillary entirely concealed under the 

 praeorbital when the mouth is closed, or a small portion of its 

 distal extremity exposed. Dorsal with 13 to 19 spines, anal with 

 3 or 4. Vertebrae 28-32 (14-17 + 13-16) \ 



Numerous species, from Syria, Africa, and Madagascar. 



1 17+15=32 in T. nilotica. 

 17-1-15=32 in T. galilaa. 

 15+13=28 in T. lata. 

 15+16=31 in T. desfontainesi. 

 14+14=28 in T. oligacanthus. 



In four of these species the third vertebra bears a very strong htemal process. 

 The process is very feeble in T. desfontainesi. 



