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Show 1889.] FROM KILIMA-NJARO. 71 and one third of the total length, without caudal. Snout much longer than the eye, the praeorbital being longer than, and as high as, the orbit. The teeth in the upper jaw form a broad villiform band, those of the outer series being a little stronger then the others. These stronger teeth, which are thirty-eight in number on each side, have the crown slightly compressed, some showing a distinct notch and being brown at the tip. Interorbital space twice as broad as the orbit, convex. Scales on the cheek rather small, in three series ; scales cycloid, of moderate size ; the lateral line is interrupted below the end of the spinous dorsal. Dorsal spines gradually increasing in length ; the sixth ray is the longest, reaching backwards to the root of the caudal; pectoral and ventral fins long, extending to, or nearly to, the anal. Coloration uniform dusky, but some of the scales on the back seem to have had a reddish-brown spot at the base. 2. The other species were obtained by F. J. Jackson, Esq., F.Z.S., in the river Ruva, in the Arusha country. SYNODONTIS PUNCTULATUS, sp. nov. (Plate VIII. fig. A.) D. 1/7. A. 11. P. 1/8. V. 8. Allied to Syndontis serratus and Syndontis guttatus. The gill-opening extends downwards to before the root of the pectoral fin. Mandibular teeth shorter than the eye, about 24 in number, no villiform teeth behind them. Maxillary barbels a little longer than the head, not fringed; mandibular barbels provided with filaments, the outer ones shorter than the head. The length of the head (from the snout to the gill-opening) is one fourth of the total length (without caudal). Nuchal carapace not much arched, longer than broad ; its posterior processes do not extend behind the dorsal spine. Dorsal and pectoral spines subequal in length, and somewhat shorter than the head; both these spines are slightly serrated in front. Humeral process twice as long as high, pointed behind. The distance between the dorsal and adipose fins is more than the length of the former, but shorter than the head. Head, body, and adipose fin covered with very numerous and very small brown dots. The dots become somewhat larger above the anal fin, on the free portion of the tail, and on the caudal fin, but none exceed the pupil in size. Two specimens, of which the larger measures 8 inches. TYLOGNATHUS MONTANUS, sp. nov. (Plate VIII. fig. B.) D. 12. A. 8. L. lat. 37. L. transv. 5/6. Snout very obtuse, rounded, with small tubercles, and with fleshy continuous lips, covering an inner, sharp, horny, labial edge on the upper as well as lower jaw. The mouth is crescent-shaped and at the lower side of the snout. A slender barbel is hidden iu a deep recess at the corner of the mouth, and the upper lip is overhung by |
