1899,] SYKIAN PISHES OF THE FAMILY CICHLID^. 123 



present on the snout and cheeks ; a round white spot may be 

 present between the last two anal rays. 



Total length 125 millim. 



Lake Tanganyika. 



27. TiLAPIA MELAlSrOPLEUEA. 



Tilapia melanopleura, A. Dum. Arch. Mus. x. 1859, p. 252, 

 pi. xxii. fig. 1. 



Chromis melanojjleura, Giinth. Cat. iv. p. 272 (1862). 



Depth of body 2 in total length, length of head 3 times. Snout 

 with slightly concave upper profile, 1| diameter of eye, which 

 is 4 times in length of head ; maxillary extending to below 

 anterior border of eye ; 5 series of scales on the cheek ; large 

 scales on the opercle. 10 gill-rakers on lower part of anterior 

 arch. Dorsal XV 12 ; last spine longest, g length of head, not 

 quite g longest soft rays. Pectoral pointed, as long as the head, 

 not extending to origin of anal. Anal III 9; third spine nearly 

 as long as last dorsal. Caudal truncate. Caudal peduncle a little 

 deeper than long. Scales cycloid, 25-26 ^ . Brown ; a large 

 black blotch on each side of the body. 



Total length 150 millim. 



Senegal. 



28. Tilapia CiERULEOMACULATA. 



Cliromis ccenileomaculatus, Eochebr. Bull. Soc. Philom. (7) iv. 

 1880, p. 166, and Act. Soc. Linn. Bord. (4) vi. 1883, p. 132, pl.iv. 

 fig. 3. 



Depth of body 2§ in total length, length of head 3 times. 

 Snout longer than eye, which is 3| times in length of head ; 

 5 series of scales on the cheek. Dorsal XIV 11 ; spines subequal 

 from the fifth. Pectoral rather short, not extending so far as 

 origin of anal. Anal III 10. Caudal truncate, shghtly emar- 

 ginate. Scales 29 j|. Dark green above, pink beneath ; a series 

 of 5 large, round, deep blue spots along each side, the first on the 

 opercle. 



Total length 137 millim. 



Senegal. 



29. TllAPIA JALLJE. 



Chromis jallce, Bouleng. Boll. Mus. Torin. xi. 1896, no. 260. 



Teeth small. Depth of body 3^ in total length, length of_ head 

 3| times. Snout a little longer than diameter of eye, which is 

 3| times in length of head and equals 1| interorbital width; 

 maxillary not extending to below anterior border of eye ; 6 or 7 

 series of scales on the cheek ; large scales on the opercle. Gill- 

 rakers very short, 9 on lower part of anterior arch. Dorsal XV 

 10 ; spines subequal from the 5th, which measures § length of 

 head ; last soft rays prolonged into filaments. Pectoral | length 

 of head. Anal III 8 ; third spine as long as longest dorsal ; soft 



