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Show 1899.] SYRIAN FISHES OF THE FAMILY CICHLID.E. 115 to 1J in interorbital width ; mouth narrow, | to |- width of head, extending to between nostril and eye; 2 series of scales on the cheek, forming a narrow oblique band ; large scales on the opercle. Gill-rakers short, 15 to 19 on lower part of anterior arch. Dorsal X V - X V I 11-13; last spine longest, g or a little less than 1 length of head, f to § longest soft rays. Pectoral falciform, \\ to l\ length of head, extending to origin of anal or beyond. Ventral reacbing vent or anal. Anal III 9-11; third spine shorter than last dorsal. Caudal truncate, slightly emarginate. Caudal peduncle deeper than long. Scales cycloid, 28-30 j ^ ; lat. 1. ~^. Olive above, golden beneath, uniform or with 5 or 6 very indistinct, narrow, dark bars; soft dorsal with dark and light spots forming oblique streaks ; a dark opercular spot. Total length 175 millim. Gold Coast. 10. TILAPIA MACROCEPHALA. Sarotherodon melanotheron (nom. nud.), Riipp. Verz. Mus. Senck. iv. p. 21 (1852); Giinth. Cat. iv. p. 273 (1862). Chromis macrocephalus (Bleek.), Giinth. 1. c. Melanogenes macrocephalus, Bleek. Nat. Verh. Vet. Haarlem, xviii. 1863, no. 2, p. 36, pi. vi. fig. 2. Teeth very small, closely set, in 4 to 6 series in both jaws. Depth of body 2\ to 2 | times in total length, length of head 2-| to 2 | times. Snout with straight or convex upper profile, lj to 1^ diameter of eye, which is 4 to 4£ times in length of head and l| to 1| in interorbital width; mouth moderate, about |- width of head, extending to between nostril and eye ; 2 series of scales on the cheek ; large scales on the opercle. Gill-rakers short, 15 to 17 on lower part of anterior arch. Dorsal X V - X V I 10-12 ; last spine longest, J- length of head, \ longest soft rays, which are somewhat produced. Pectoral falciform, 11 to \\ length of head, extending to origin of anal or beyond. Ventral reaching origin of anal. Anal III 7-9 ; third spine a little shorter than last dorsal. Caudal truncate, slightly emarginate. Caudal peduncle deeper than long. Scales cycloid, 28-30 jfz^; lat. 1. y ^ . Olive-brown above, golden beneath; indistinct light spots on the soft dorsal and caudal fins, forming oblique streaks on the former; a black opercular spot; chin and gular region black, or marbled with black. Total length 145 millim. Gold Coast. 11. TILAPIA NIGRIPINNIS. Tilapia nigripinnis (Guichen.), A. Dum. Arch. Mus. x. 1859, p. 254, pi. xxii. fig. 2. Chromis nigripinnis, Giinth. Cat. iv. p. 270 (1862). Teeth very small, in 4 or 5 closely-set series in both jaws. 8* |
