The Freshwater Fishes of South Africa. 



485 



Two specimens, 218 rnm., 219 mm. in length respectively, from 

 Pieuaars River, Transvaal. Pretoria Museum. 



The species appears also to i-auge from German East Africa to 

 Natal. 



4. TILAPIA VOKAX, Pfeff. 



Chromis vorax, Pfeff. Jahrb. Hamb. Wiss. Anst. x, 1893, p. 151, pi. ii, 

 figs. 9-11, and Thiervv. O.-At'r., Fische, p. 12, fig. 8 (1896). 



Tilapia vorax, Bouleiig., Proc. Zool. Soc., 1899, p. 125, and Freshw. 

 Fish. Afr., iii, p. 156, fig. 102 (1915) ; Pellegr., Mt'm. Soc. Zool. France, 

 xvi, 1904, p. 322. 



' ' '"> i .'.' 



':',.-. ; w 

 ^s^Sirfte 



FIG. 121. Tilapia vorax. Type, after Pfeffer (Jahrb. Hamb. Wiss. Anst., 



' 1893). |. 



Teeth small, in 4 rows, about 60 in outer series of upper jaw. 

 Depth of body about equals length of head, 2f times in total length 

 excluding caudal. Head twice as long as broad ; snout with straight 

 upper profile, equal to post ocular part of head, about as broad as long, 

 twice diameter of eye, which is 5 times in length of head and nearly 

 twice iuterorbital width ; mouth large, width of head, extending to 

 anterior border of eye ; 3 series of scales on the cheek, width of scaly 

 part slightly less than diameter of eye. Grill-rakers short, 18 on lower 

 part of anterior a- di. 



