490 Annals of the South African Museum. 



times length of head, reaching to about middle of anal. Ventral 

 ~ length of head, reaching scarcely to anal. Anal iii 9, 3rd spine 

 slightly longer than longest dorsal spines. Caudal truncate, slightly 

 emarginate ; caudal peduncle 1* times as deep as long. Scales cycloid, 

 28^; lateral Hues -f-f. 



Colour (of pi'eserved specimen) greyish-brown above, whitish 

 below ; scales dark in centre, forming indistinct longitudinal streaks 

 between the series ; about 10 more or less distinct dark cross-bars on 

 body the first extending across the nape, the next starting about the 

 level of the opercular spot crosses in front of the origin of dorsal fin, 

 the 7th below anterior rays of soft dorsal, or extends downwards to 

 just below the median line; a dark opercular spot; dorsal with 

 oblique dark bars enclosing whitish spots, especially on soft portion ; 

 anal with dark and light spots. 



One specimen, 62 mm. in length, from Shesheke, Southern Rhodesia 

 (Rev. L. Jalla). 



This species resembles T. natalensis in many respects, but has a 

 greater number of gill-rakers, the diameter of eye is much greater 

 than least depth of preorbital, lateral line has fewer scales transversely, 

 and the colour markings are different. 



8. TILAPIA <SALILAEA, Art. 



S'parus galilaeus, Artedi, in Hasselq. Iter Palaest., p. 343 (1757). 



Tilapia pleuromelas, A. Dum., Arch. Mus., x, 1859, p. 253. 



Tilapia lateralis, A. Dum., I.e. 



Tilapia macrocentra, A. Dum., t.c., p. 256. 



Chromis ? galilaeus, Giinth., Cat, Fish., iv, p. 273 (1862). 



Chromis niloticus, part., Giinth., t.c., p. 267, Proc. Zool. Soc., 1864, 

 p. 490, and Petherick's Trav., ii, p. 216 (1869) ; Steindr., Sitzb. Ak. 

 Wien, Ix, i, 1870, p. 964, pi. iv, fig. 1. 



Chromis pleuromelas, Giinth., Cat. Fish., iv, p. 271 (1862). 



Chromis lateralis, Giinth., t.c., p. 272. 



Chromis niloticus, Steindr., Verh. zool.-bot. Ges. Wien, xiv, 1864, 

 p. 226 ; Tristram, Faun. Palest., pi. xviii, fig. 1 (1884). 



Chromis tiberiadis, Lortet, Ann. Mus. Lyon, iii, 1883, p. 135, pi. vi. 



Chromis microstomus, Lortet, t.c., p. 139, pi. viii, fig. 1. 



Tilapia galilaea, Bouleng., Proc. Zool. Soc., 1899, p. 114, Fish. Nile, 

 p. 581, pi. xcv (1907), and Freshw. Fish. Afr., iii, p. 169, fig. 109 

 (1915) ; Pellegr., Mem. Soc, Zool. France, xvi, 1904, p. 311. 



Teeth in three to four series, 64 (circa) in outer series of upper jaw. 

 Depth of body 2| times in total length excluding caudal, length of 



