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Show 1880.] MR. C R A V E N O N S H E L L S F R O M U S A M B A R A . 217 Dimensions :--Greatest diameter 24 millims., smallest diameter 20, height from base of aperture to apex 15, breadth and height of aperture 11. Locality. Magila, at the foot of the Usambara hills, in thick woods near a waterfall. This species has more the appearance of some of the North- American forms than of the African. HELIX ZANGUEBARICA, sp. nov. (Plate XXII. fig. 4.) Shell conically turbinate, perforate, transparent, smooth, and of a uniform dark brown colour; apex obtuse, spire rather depressed ; whorls 4 | to 5, all convex, the last as broad as the remainder together ; aperture ovately lunate, broader than high ; labrum sharp and simple, excepting near the umbilicus, where it is slightly reflexed outwardly; suture deep and well defined; umbilicus* very small. Dimensions :-Greatest diameter 3 millims., smallest diameter 2*7, height from base of aperture to apex 2*4, breadth of aperture 1*4, height of aperture *9. Locality. Magila, on decaying vegetation. Mr. J. S. Gibbons found some dead specimens on Zanzibar Island. BULIMUS KIRKII, Dohrn, P.Z.S. 1865, p. 232. Locality. Magila, in woods. The specimens collected are rather larger than those in the British- Museum collection. BULIMUS PUNCTATUS (Anton), Verz. p. 42. no. 1540; Reeve, Conch. Icon. no. 452, pl. 65. Very plentiful at Pangani and Marongo. BULIMUS OVOIDEA, Brug. Enc. Meth. i. p. 335. no. 64 ; Kiister, Icon. Moll. (Pupa) p. 120, pl. 16. figs. 2, 3. Several fine specimens in woods, Magila. BULIMUS OBESUS (Gibbons, MS.), Quart. Journ. of Conch, vol. i. p. 255, pl. ii. fig. 3. This species closely resembles Bulimus ovoides (Brug.), but is of much smaller size. Locality. Magila and Pangani. Dr. Kirk took a living specimen at Magila; the animal was of a pale green colour, visible through the shell. BULIMUS MAGILENSIS, sp. nov. (Plate XXII. fig. 3.) Shell turriform, subtransparent, solid, very glossy, showing the lines of growth very plainly, of a pale olive-brown colour, rather lighter near the apex ; apex large and obtuse, spire elongated ; whorls 9 to 10, very slightly convex and gradually increasing ; aperture pyriform, occupying rather less than one sixth of the entire length of the shell; labrum simple, columella somewhat oblique and |