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Show 1899.] SYRIAN FISHES OF THE FAMILY CICHLID.E. 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 MELANOPLEURA. Tilapia melanopleura, A. Dum. Arch. Mus. x. 1859, p. 252 pi. xxii. fig. 1. ] Chromis melanopleura, 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 iu 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 X V 12; last spine longest, ^ length of head, not quite | longest soft rays. Pectoral pointed, as long as the head, not extending to origin of anal. Anal H I 9; third spine nearly as long as last dorsal. Caudal truncate. Caudal peduncle a little deeper than long. Scales cycloid, 25-26 J. Brown; a large black blotch on each side of the body. Total length 150 millim. Senegal. 28. TILAPIA CJEKULEOMACTJLATA. Chromis ccerideomaculatus, Rochebr. 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 X I V 11; spines subequal from the fifth. Pectoral rather short, not extending so far as origin of anal. Anal III 10. Caudal truncate, slightly emarginate. 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. TILAPIA JALLVE. 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 AA'idth ; 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 X V 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 |