150 DR. J. C. COX ON NEW LAND-SHELLS FROM [Jail. 21, 



brown colour, profusely ornamented and zoned with opaque white ; 

 apex almost black, transversely striated from left to right with very 

 fine straight striae, which are decussated above with slightly undu- 

 lating coarser striae from right to left, at the base these undulating 

 striae becoming longitudinal ; whorls 5, convex, suture deep ; base 

 convex ; aperture rotundately lunar, dark chestnut within ; lip white ; 

 margins somewhat approximating, joined by a thin callus ; upper 

 margin broadly expanded, basal reflected, columellar margin tri- 

 angularly dilated and reflexed, half concealing the umbilicus. 



Diam., greatest # 87, least 0*71 ; height - 68 of an inch. 



Hab. Solomon Islands. 



In my own collection. 



During the last few weeks large numbers of this shell have been 

 obtained from one of our island traders. I was at first disposed to 

 look upon it as a variety of Helix eddystonensis (Reeve) ; but the 

 sculpture of this shell appears to me to be always coarser, and the 

 surface invariably more or less covered with a thick white opaque 

 enamel, unlike the thin epidermis which covers H. eddystonensis. 

 Its dark, almost black, apex and white-zoned and irregularly orna- 

 mented body show in strong contrast, and resemble more some of 

 the Philippine-Island species than any of those found at the 

 Solomon Islands. This species is uniformly of a smaller size than 

 H. eddystonensis, and is more solid and more raised in the spire. 



Helix crustultjm, sp. nov. 



Shell almost flat, with a broad shallow umbilicus, transversely ar- 

 cuately striated, of a pale brown colour, with a light margin ; whorls 6, 

 slowly increasing in size, almost flat, last very sharply keeled ; suture 

 margined ; spire scarcely raised ; base flat, a little raised round the 

 umbilicus ; aperture very oblique, depressed, angularly lunate ; peri- 

 stome simple ; margins very slightly approximating, blunted below, 

 columellar margin not dilated. 



Diam., greatest 0'84, least 0*70 ; height 0*26 of an inch. 



Hab. Solomon Islands. 



In the collection of Mr. Hargraves, Sydney. 



Helix (Geotrochus) zelina, sp. nov. (Plate XVI. fig. 6.) 



Shell imperforate, pyramidally conical, transparent, thin, obliquely 

 and very coarsely striated, straw-coloured ; whorls 7, almost flat, the 

 last having a very sharp produced keel ; suture broadly margined 

 above ; base flat ; aperture trapeziform ; outer margin a little re- 

 flected ; peristome thickened and white, particularly the lower margin, 

 which is a little everted and reflexed, columellar margin rather con- 

 tracted and nodose. 



Diam., greatest 6-02, least 0*55 ; height 0*60 of an inch. 



Hab. Solomon Islands. 



In Mr. Hargraves' s collection. 



This species is probably more closely allied to H. cineracea 

 (llomb. et Jacq.) and H. subtecta (Pfr.) than to any other. It is 

 a much more conical shell than these, and its sculpture decidedly 



