TILAPIA. 



109 



1-2, 3-12, 13-25. 

 Types. 

 26-27. Types. 

 28-20. Ad. 

 30. Skel. 

 31-32. Types. 

 33, 34-36. Types. 



37. Ad. 



38. Ad. 



39. Y<r. 



Entebbe, L. Victoria. 



Lake near Entebbe. 



>i }> 



Entebbe. 



I'nii jako, L. Victoria. 

 Bnganga, ,, 

 Jinja, Ripon Falls. 



Victoria Nile, between L. 



Kioge and Murchison 



Falls. 

 L. Gangu, W. of L. Victoria. 



Mr. E. Degen (0.). 



C. C. Gowdey, Esq. (P.). 

 Mr. E. Degen (C). 



Dr. E. Bayon (C.) ; 



Genoa Museum (P.). 

 Dr. E. Bayon (C.) ; 



Genoa Museum (P .). 



C. M. Woodhouse, Esq. (P.). 



13. TILAPIA GALILiEA. 



Sparvs galilceus, Artedi, in Hasselq. Iter Palrest. p. 313 (1757). 



Tilapia pleuromelas, A. Dura. Arch. Mus. x. 185!', p. 253. 



Tilapia lateralis, A. Dmn. 1. c. 



Tilapia macrocentra, A. Dum. t. c. p. 25G. 



Chromis? galilceus, Giintli. Gat. Fish. iv. p. 273 (1862). 



Chromis niloticvs, part., Giintli. t. c. p. 2G7, Proc. Zool. Soc. 1864, p. 490, and 



Petherick's Trav. ii. p. 216 (1869) ; Steind. Sitzb. Ak. Wien, Ix. i. 1870, 



p. 964, pl. iv. fig. 1. 

 Chromis pleuromelas, Giintli. Cat. p. 271. 

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

 Chromis nilolicus, Steind. Verh. zool.-bot. Ges. Wien, xiv. 1864, p. 226 ; Tristram, 



Faun. Palest, pl. xviii. fig. 1 (1884). 

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

 Chromis microstomas, Lortet, t. c. p. 139, pl. viii. fig. 1. 

 Tilapia galihca, Bouleng. Proc. Zool. Soc. 1899, p. 114 : Pellrgr. Mem. Soc. Zool. 



France, xvi. 1904, p. 311 ; Bouleng. Fish. Nile, p. 531, pl. xcv. (1907). 



Depth of body 1£ to 2\ times in total length, length of head 2§ to 

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

 straight or convex upper profile, as broad as or a little broader than 

 long, \ to f postocular part of head ; eye 3 (young) to 6 times in length 

 of head, 1 (young) to 2| times in interorbital width, less than prreorbital 

 depth in adult ; mouth small, not more than ^ width of head, extending 

 to below nostril, or slightly beyond; teeth in 3 (young) to 10 series, 

 40 (young) to 120 in outer series of upper jaw ; 2 or 3 series of scales 

 on the cheek, width of scaly part not exceeding diameter of eye. Grill- 

 rakers short, 18 to 25 on lower part of anterior arch. Dorsal XVI- 

 XVII (rarely XV) 12-14 ; spines very strong, lust longest, |- to f length 



