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Show 218 MR. CRAVEN ON SHELLS FROM USAMBARA. [Mar. 16, faintly reflexed; suture very deep but narrow, slightly puckered at its edges. Dimensions;-Length 30 to 35 millims., breadth of last whorl 9, height of aperture 7, breadth of aperture 4|. Locality. Magila, under moss growing on rocks. ACHATINA KIRKII, sp. nov. (Plate XXII. fig. 9.) Shell turriform, obliquely lirate, of a yellowish-brown colour, sometimes marked with chocolate-coloured spiral bands; epidermis glossy ; apex very obtuse ; spire rather elongated ; whorls 7\, convex, the last occupying rather more than one third of the entire length of the shell; labrum thin, simple ; columella obliquely curved; the generic fold small, but well defined ; suture deep. Dimensions :-Length 26 millims., breadtb of last whorl 12, height of aperture 10, breadth of aperture 6. Locality. Magila, along with Helix usambarica, in woods near a waterfall, scarce. I have great pleasure in naming this species after Dr. Kirk, H.M. Consul-General in Zanzibar. PUPA USAMBARICA, sp. nov. (Plate XXII. fig. 2.) Shell pupiform, rimate, gibbose, strongly obliquely lirate ; apex obtuse ; whorls 8, very convex, narrow, gradually increasing, the sixth being the broadest and the last slightly detached and a little produced ; aperture small, armed with six teeth ; a large thin lamellar tooth extending some distance within the shell, at the centre of the upper margin ; three teeth, of which the centre one is the largest, on the labrum or outer lip ; a small and narrow internal lamellar tooth a little below the centre of the labrum ; a broad bifid tooth on the columellar margin; none of these teeth, with the exception of the one on the upper margin, reaches the margin of the aperture ; on the exterior of tbe last whorl are small depressions or pits corresponding with the teeth ; labrum entire, expanded and somewhat reflexed ; suture well defined. Dimensions:-Diameter of sixth whorl 6 millims., greatest diameter of last whorl 7, smallest diameter of last whorl 5, height from base of aperture to apex 11, height of aperture 4, breadth of aperture 3g. Locality. Magila ; rare. CYCLOSTOMA ZANGUEBARICUM, Petit, Journ. d. Conch, vol. i. p. 53, pl. iii. fig. 6. Locality. Pangani, Marongo, and Zanzibar ; very abundant round the roots of shrubs and trees. CYCLOPHORUS MAGILENSIS, sp. nov. (Plate XXII. fig. 1.) Shell depressed, subdiscoid, umbilicated, striated by fine lines of growth, glossy, of a yellowish-brown colour; apex flattened and very obtuse ; whorls 4, very convex and rapidly increasing, the last slightly descending near the aperture ; aperture circular ; labrum |