394 LIST OF LAND SHELLS FOUND ON THURSDAY ISLAND. 



more conical and are in every respect a larger shell. The typical 

 form is found at Cape York and Albany Island, North Australia ; 

 also Bet, Sue, Cococa Nut and "Warrior Islands, Torres Straits ; 

 the type of the variety I have deposited. in the British Museum. 



4. Helix (Planispira) Buxtoni, n. sp. 



Shell umbilicated, depressed, thin, slightly shining, brownish 

 horn under a velvety periostraca ; faintly obliquely striated ; 

 suture distinctly impressed, covered with short, minute, sharp- 

 pointed stiff hairs ; spire small, apex slightly raised, granulated, 

 whorls 4£, convex, last large and rounded ; deflected in front, 

 base convex with a few minute scattered hairs ; umbilicus rather 

 wide outwardly, aperture diagonal, lunately rounded, peristome 

 flesh tinged, expanded, margins approximating, right thin, 

 columellar margin regular, finely granulated, broadly reflected, 

 but not covering the umbilicus. Diam. maj. 6, min. 4f, alt. 3 

 lin., width of umbilicus 1 lin. 



There are two distinct varieties of this species, one is dark 

 brownish-horn, the other reddish-brown, the least rubbing will 

 remove the beautiful velvety periostraca with the short minute- 

 pointed hairs that gives the surface the appearance of being 

 granulated with minute lengthened grains. I wet the outer 

 surface of one specimen and removed the outer coating with the 

 point of a penknife ; this entirely alters the appearance, showing 

 the strise at the suture and umbilicus to be very much coarser, 

 other parts being quite smooth. They resemble dark varieties 

 of Helix Delessertiana with with the sculpture removed. 



I received twenty-four fine specimens from Mr. Beddome in 

 their natural dirty black state, a little clear water and sponge 

 improved them, when dry they cling to the cotton in the box in 

 which they are placed, like Helix spinet, Cox, H hrevipila, Pfr., 

 and a few other hairy Australian species. The type specimen I 

 have deposited in the British Museum. 



