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 somewhat more curved than the lower and steadily ascends to the dorsal fin. Eye small, one-fifth of the length of the head. The height of the body is contained $2 3⁄5$ times in the total length (without caudal), the length of the head $3 3⁄4$ times; the caudal peduncle is slender, much shorter than the head, its depth being two-fifths of its length. The origin of the dorsal fin is behind that of the anal and nearer to the root of the caudal than to the head. The anal extends also further backwards than the dorsal. Pectoral shorter than the head, reaching to the middle of the ventral. Ventral very short, only half as long as the pectoral or as the distance of its root from the vent. Scales rather large; there are eight in an oblique series running from the first anal ray to the lateral line, and three and two half longitudinal series on the side of the peduncle of the tail. Silvery brownish above; a deep black spot on the root of the caudal, and another high up on the side below the origin of the dorsal fin.

One specimen from Talagouga.

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Mormyrus (Petrocephalus) simus, Sauvage, Bull. Soc. Philom. 1878, P. 100; Nouv. Arch. Mus. iii. 1880, p. 51, pl. ii. fig. 3 (fig. mediocr.).

Mormyrus tenuicauda, Steind. Notes Leyd. Mus. xvi, 1894, p. 69, pl. iv. fig. 1.

Snout short, obtuse, a little shorter than the eye, with the mouth at its lower side. The mouth is narrow, not wider than the eye, armed above with twelve and below with twenty-two teeth; its corner lies beyond the vertical from the front margin of the eye. The upper profile of the head is a little more curved than the lower, and steadily ascends to the origin of the dorsal fin. Eye one-fourth of the length of