162 CICULID-^. 



13-15, lC-19. Types. L. Bangwelu. F. H. Melland, Esq. (P.). 



20. Yg. L. Mweru. Capt. Lemaire (C). 



21. Yg. Hot springs near Kafue K., J. M. Mowbray, Esq. (P.). 



N.W. Rhodesia. 



10. TILAPIA NILOTICA. 



Lahrus niloticus, Linn, in Hasselq. Iter Palset. p. SiG (1757), and S. N. i. p. 477 



(1766) ; Sonnini, Voy. Egypte, ii. p. 395, pi. xxvii. fig. 1 (1799). 

 Chromis 7nlotica, Cuv, in Guer. Icon. R. An. i. Poiss. pi. xliv. fig. 1 (1841:) ; 



Sauv. Bull Soc. Philom. (7) iv. 1880, p. 211 ; Lortet, Ann. Mus. Lyon, iii. 



1883, p. 137, pi. vii. ; Mitch. Rep. Fish. L. Menzaleh, p. 12, pi. ii. (1895) ; 



Gunth. Proc. Zool. Soc. 1896, p. 218. 

 Chromis niloticus, p:irt., Giiuth. Cat. Fish. iv. p. 267 (1862), and Proc. Zool. Soc. 



1864, p. 490 ; Steind. Verb, zool.-bot. Ges. Wien, xiv. 1864, p. 226 ; Peters, 



Reise Mossamb. iv. p. 23 (1868) ; Glinth. Petherick's Trav. ii. p. 216 (1869) ; 



Stoind. Sitzb. Ak. Wien, Ix. i. 1870, p. 96 ; PfefF. Jahrb. Hamb. Wiss. Anst. 



X. 1893, p. 149 ; Vincig. Ann. Mus. Genova, (2) xv. 1895, p. 28 ; Pfeff. 



Thierw. O.-Afr., Fische, p. 10 (1896). 

 Chromis guentheri, Steind Verh. zool.-bot. Ges. Wien, xiv. 1864, p. 228, pi. viii. 



figs. 3 & 4. 

 Chromis spilurus, Glinth. Proc. Zool. Soc. 1894, p. 89, pi. x. fig. A, and 1896, 



p. 219. 

 Tilapia nilotica, Bouleng. Tr. Zool. Soc. xv. 1898, p. 6, Proc. Zool. Soc. 1899, 



p. 112, and Poiss. Bass. Congo, p. 455 (1901) ; Pellegr. Mem. Soc. Zool. 



France, xvi. 1904, p. 309 ; Bouleng. Tr. Zool. Soc. xvii, 1906, p. 571, and 



Fish. Nile, p. 523, pis. xciii. & xciv. (1907). 

 Tilapia nyirica, Lonnb. Svensk. Vet.-Ak. Haiidl. xlvii. no. 6, 1911, p. 41. 



Depth of body 2 to 2f times in total length, length of head 2f to 3^ 

 times. Head If to 2 times as long as broad ; snout rounded, with 

 straight or slightly convex upper profile, 1 to 1| times as broad as long, 

 J to f postocular part of head ; eye 3-| (young) to 5f times in length of 

 head, 1 (young) to 2\ times in interorbital width, equal to or less than 

 praeorbital depth; mouth moderately large, -^ to f width of head, 

 extending to below anterior border of eye or to between nostril and eye ; 

 teeth in 2 (young) to 7 series, 30 (young) to 90 in outer series of upper 

 jaw ; 2 or 3 series of scales on the cheek, width of scaly part not 

 exceeding diameter of eye. Gill-rakers short, 17 to 25 (rarely as few as 

 15) on lower part of anterior arch. Dorsal XVI-XVII (rarely XV or 

 XVIII) 11-15 ; spines subequal from the fifth, or last longest, ^ to i 

 length of head ; longest soft rays f to once length of head. Anal III 

 8-11 ; third spine as long as or shorter or a little longer than longest 



