1899.] STUtAN MSHES OF THE B'AMILY OlCHlID^. 105 



11. Ebetmodus Blgr. 

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



1. Ebetmodtjs cyanosticttjs Blgr. 

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



Lake Tanganyika. 



12. Tbopheus Blgr. 

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



1. Tbophetjs mooeii Blgr. 

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



Lake Tanganyika. 



13. SiMOCHROMIS Blgr. 

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



1. SiMOCHEOMIS DIAGEAMMA Grtlir. 



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

 Lake Tanganyika. 



14. TiLAPIA. 



Tila2na, Smith, 111. Zool. S. Afr., Fish, (1840). 



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

 Cat. iv. p. 273 (1862). 



Goptodon, Gervais, Bull. Soc. Agric. Herault, 1853, p. 81. 



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



Ohromis, Giinth. Cat. iv. p. 267. 



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



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

 p. 76. 



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



Ctenochromis, Pfeff. Jahrb. Hamb. wiss. Anst. 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 

 prseorbital 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. VertebrEB 28-32 (14-17 + 13-16) \ 



Numerous species, from Syria, Africa, and Madagascar. 



1 17+15=32 in T. nilotica. 

 17+15=32 in T. galilma. 

 15+13=28 in T. lata. 

 15+16=31 in T. desfontainesi. 

 14+14=28 in T. oligacanthus. 



In four of these species the tbird vertebra bears a very strong hamal process. 

 The process is very feeble in T. desfontainesi. 



