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Show 90 DR. A. GUNTHER ON REPTILES AND [Jan. 16, 7. SYNODONTIS ZAMBEZENSIS, Ptrs. Ngatana. 8. ALESTES AFFINIS, sp. n. Allied to Alestes imberi. D. 11. A. 18-19. L. lat. 21. L. transv. |. The height of the body is one third of the total length (without caudal) ; the length of the head two sevenths. The origin of the dorsal fin is distinctly behind the base of the ventrals; pectoral reaching the ventral. Silvery, with an indistinct shining band along the side ; a blackish spot behind the shoulder and another at the root of the caudal. Three specimens, 3 | inches long, were obtained at Merifano on the Tana River. 9. LABEO GREGORII, sp. n. (Plate X. fig. B.) D. 14. A. 7. L. lat. 37. L. transv. % Mouth broad, crescent-shaped; lower lip thick and fringed with an inner fold which is covered with horny substance. Snout thick, produced, obtuse in front, much projecting beyond the lower jaw, without lateral lobe ; maxillary barbel small, hidden in a deep lateral groove. Eye rather large, two sevenths of the length of the head, rather shorter than the snout, and somewhat nearer to the end of the snout than to the gill-opening. The length of the head is contained thrice and two thirds in the total length (without caudal), the depth of the body thrice and a half. Interorbital space broad, scarcely convex, its width being one half of the length of the head. There are four longitudinal series of scales between the lateral line and the root of the ventral fin. Upper margin of the dorsal fin oblique ; anal extending to the caudal, the pectoral to the ventral. Greenish above, silvery on the sides and below. One specimen, 5 inches long, was obtained at Merifano on the Tana River. 10. BARBUS TANENSIS, sp. n. (Plate XI.) D. 12. A. 7 or 8. L. lat. 25. L. transv. % The osseous dorsal ray is strong, not serrated, its stiff portion being rather shorter than the head. There are one and a half longitudinal series of scales between the lateral line and the root of the ventral fin. Body compressed, its greatest depth contained twice and three fourths in the total length (without caudal). Head rather small, one fifth of the total length, measured to the end of the middle caudal rays. Snout of moderate length, with the upper jaw overlapping the lower, and with four barbels, of which the posterior reaches to the angle of the pra?operculum. The diameter of the eye is two ninths of the length of the head and two thirds of that of the snout. Origin of the dorsal fin opposite to the root of the ventral and nearly midway between the end of the snout and the root of the caudal. Caudal fin deeply |