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. 



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 - 71, least 056 ; height 0'66 of an inch. 



Hab. Solomon Islands. 



In the collection of Mr. W. H. 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 b.) 



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 

 4|, rapidly increasing, the last largely expanded ; suture excavated ; 

 peristome simple, submembranaceous ; columella arched. 



Diam., greatest 0'34, least - 25 ; height 0-14 of an inch. 



Hab. On the top of a high mountain, Lord Howe's Island. 



In my 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 my 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 mar- 

 gined ; whorls 6, convex, last produced ; aperture diagonal, ovately 

 lunate, dark purple within ; peristome broadly expanded and re- 

 flected throughout ; margins joined by a thin callus, columellar 

 margin triangularly dilated, overhanging the umbilicus. 



Diam., greatest 1*27, least T08 ; height T12 of an inch. 



Hab. Eockhampton, Australia. 



In my own collection. 



This is an interesting link between H. blomfieldi (which it in 



