| OCR Text |
Show 1899.] SYRIAN FISHES OF THE FAMILY CICHLID.E. 113 on the body and a dark spot just below the upper profile of the caudal peduncle. Total length 350 millim. Lake of Galilee and Jordan; Nile ; Lakes Abaya, Rudolf, Albert Edward, and Victoria; Gallaland ; Senegal; Niger. 6. TILAPIA TANGANICCE. Chromis tanganicce, Giinth. Proc. Zool. Soc. 1893, p. 630, fig. Tilapia tanganicce, Bouleng. Tr. Zool. Soc. xv. 1898, p. 5. Teeth very small, in 5 or 6 series in both jaws. Depth of body 2j in total length, length of head 2|. Snout with straight upper profile, slightly longer than diameter of eye, Avhich is 3| times in length of head and If in interorbital Avidth ; mouth rather small, i width of head, extending to below nostril; 3 series of scales on the cheek ; large scales on the opercle. Gill-rakers short, slender, 20 or 21 on lower part of anterior arch. Dorsal XVI-XVII 11-13 ; spines equal in length from the sixth, measuring f- length of head and | longest soft rays. Pectoral pointed, a little longer than head, extending beyond origin of anal. Ventral reaching vent. Anal III 9-10; third spine a little shorter than longest dorsals. Caudal truncate, slightly emarginate. Caudal peduncle as long as deep. Scales cycloid, 32-33 -j^b-; lat. 1. -^. Olive above, silvery beneath ; soft dorsal with rather indistinct oblique dark streaks. Total length 95 millim. Lake Tanganyika. 7. TILAPIA NATALENSIS. Chromis niloticus, part., Peters, Arch. f. Nat. 1855, p. 267, and Reise n. Mossamb. iv. p. 23 (1868) ; Pfeffer, Jahrb. Hamb. wiss. Anst. x. 1893, p. 149, pi. iii. figs. 1-4, and Thiervv. O.-Afr., Fische, p. 10, fig. (1896). Chromis 7nossambicus, part., Giinth. Cat. iv. p. 268 (1862). Chromis natalensis, M . Weber, Zool. Jahrb., Syst. x. 1897, p. 147. Teeth very small, in 4 or 5 series in both jaws. Depth of body 2\ to 2 | times in total length, length of head 3 times. Snout Avith straight or slightly convex upper profile, \\ to If diameter of eye, which is 4 to 4 | times in length of head and \\ to 2 in interorbital width ; mouth moderate, f to § width of head; maxillary extending to between nostril and eye; 2 or 3 series of scales on the cheek ; large scales on the opercle. Gill-rakers short, 17 to 20 on lower part of anterior arch. Dorsal XVI-XVI1I 10-12; last spine longest, f to 5 length of head, | to § longest soft rays. Pectoral pointed, as long as or a little longer (11) than the head, extending to origin of anal. Ventral reaching vent or origin of anal. Anal III 9-11 ; third spine a little shorter but stronger than last dorsal spine. Caudal truncate or very slightly notched. Caudal peduncle as long as deep or a little longer than deep. Scales PROC. ZOOL. Soc-1899, No. VIII. 8 |
