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

 Types. 

 26-27. Types. 

 28-29. Ad. 

 30. Skel. 

 31-32. Types. 

 33, 34-3(5. Types. 



37. Ad. 



38. Ad. 



39. Ys. 



TILAPIA. 



Entebbe, L. Victoria. 



Lake near Entebbe. 



Entebbe. 



Bnnjako, L. Victoria. 



Buganga, 



Jinja, Ripon Falls. 



Victoria Nile, between L. 



Kiogo and Murchison 



Falls. 

 L. Gangn.W. of L. Victoria. 



169 

 Mr. E. Degen (d). 



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

 Mr. E. Deo:en (C). 



Dr. E. Bayon ((!.) ; 



Genoa Museum (P.). 

 Dr. E. Bayon (C.) ; 



Genoa Museum (P ). 



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



13. TILAPIA GALILiEA. 

 Spams galilmts, Artedi, in Hassolq. Iter Pala33t. p. 343 (17.57). 

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

 J\lapia lateralis, A. Dum. 1. c. 

 Tilajna macroceiitra, A. Dum. t. c. p. 25G. 

 Cluvmis? galikviis, Gunth. Cat. Fish. iv. p. 273 (18G2). 

 Ch'omis nihtiais, part., Giinth. t. c. p. 2G7, Proc. Zool. Soc. .1864, p. 490, and 



Petherick's Trav. ii. p. 216 (1869) ; Steind. Sitzb. Ak. Wien, Ix. i. 187U, 



p. 964, pi. iv. fig. 1. 

 Clu'omis pleuromelas, Giinth. Oat. p. 27J. 

 C/iromis lateralis, Giinth. t. o. p. 272. 

 Cliromis niloticiis, Steind. 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 microstomiis, Lortet, t. c. p. 139, pi. viii. fig. 1. 

 Tilapia f/alihea, Bouleng. Proc. Zool. Soc. 1899, p. 114 ; Pcllegr. Mem. Soc. Zool. 



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



Depth of body If to 2| times in total length, length of head 2f to 

 3 times. Plead !-§- to 2 times as long as broad; snout rounded, with 

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

 long, -J to f postocular part of head ; eye 3 (yoiuig) to 6 times in length 

 of head, 1 (young) to 2^ times in interorbital width, less than prteorbital 

 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. Gill- 

 rakeis short, 18 to 25 on lower part of anterior aich. Dorsal X\'l- 

 X'N'II (rarely XV) 12-14 ; spines very strong, lust longest, f to f length 



