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Show 1873.] AUSTRALIA AND THE SOLOMON ISLANDS. 151 coarser; the flattened-out keel of the periphery is also characteristic of this species. LEPTOPOMA HARGRAVESI, sp. nov. to Shell globosely turbinated, rather narrowly umbilicated, yellow-brown ; whorls 5, the last obsoletely keeled at the periphery, regularly longitudinally coarsely ribbed; ribs about 16, interstices of the ribs finely longitudinally striated with waved striae ; peristome white, rather broadly reflexed ; margins united by a thin callus. Diam., greatest 0*71, least 0*56 ; height 0*66 of an inch. Hab. Solomon Islands. In the collection of Mr. W . II. Hargraves, Sydney. This beautiful species may be at once recognized by its prominent longitudinal ribs, the interstices of which are finely striated with waved longitudinal striae. HELICARION HILLI, sp. nov. (Plate XVI. figs. 7 a, 7 bi) Shell imperforate, thin, depressed, horny yellow, shining, striped with lines of growth transversely, and longitudinally at irregular intervals with fine waved lines ; spire short, not prominent; whorls 4h, rapidly increasing, the last largely expanded ; suture excavated ; peristome simple, submembranaceous ; columella arched. Diam., greatest 0*34, least 0*25 ; height 0*14 of an inch. Hab. On the top of a high mountain, Lord Howe's Island. In m y own collection. HELICARION BRAZIERI, sp. nov. Shell imperforate, orbicularly depressed, thin, shining, striated with lines of growth, under the lens very finely granular; spire slightly elevated, ornamented transversely with irregular yellow and olive-brown zones, paler below; apex tinged with rose; whorls 4, last inflated; suture margined above; aperture large, rounded, oblique ; peristome simple, submembranaceous ; columella arched. Diam., greatest 0*44, least 0*32 ; height 0*26 of an inch. Hab. Fitzroy Island, N.E. coast, Australia. In m y own collection. HELIX ROCKHAMPTONENSIS, sp. nov. Shell with a large open umbilicus, globosely conical, finely striated, dark purple chestnut, indistinctly ornamented at the base and apex with narrow yellow bands, the latter lightest; base flat, excavated round the umbilicus; spire large, bluntly conical, suture not margined ; whorls 6, convex, last produced ; aperture diagonal, ovately lunate, dark purple within ; peristome broadly expanded and reflected throughout; margins joined by a thin callus, columellar margin triangularly dilated, overhanging the umbilicus. Diam., greatest 1*27, least 1*08; height 1*12 of an inch. Hab. Rockhampton, Australia. In m y own collection. This is an interesting link between H. blomfieldi (which it in |