TASMANIAN LAND SHELLS. 



2. — Helix ( ) bisulcata — Pfr. 



Pfr., Pro. Zool. Soc, 1852, p. 135. 

 Reeve, Cone. Icon., sp. 969. 

 Cox, Mon., 1868, p. 32, pi. ix., fig. 19. 

 Legrand, Col. for Mon., si)ecies 1. 



Shell widely umbilicated, convexly depressed, spirally and very 

 minutely obliquely wrinkle-striated, shining, tawny chestnut ; spire 

 shortly conoidly-convex, slightly obtuse at the apex ; suture impressed ; 

 whorls 6 J, slightly convex, last much wider ; periphery obsoletely angular, 

 not descending in front ; base flat, sub-compressed about the umbilicus, 

 on both sides impressedly furrowed in the middle ; aperture small, 

 slightly oblique, sub-triangularly lunate \ peristome rather simple, mar- 

 gins scarcely converging, right straight, sloping, basal slightly arched, 

 somewhat thickened. 



Diameter, greatest 1"14, least 0*98 ; height, 0*50 of an inch. 



Habitat. — Tasmania. Gunn. 



Keeve remarks that it is Solarium shaped, the apex tinged with 

 red, and that the lip is simple, peculiarly wart-toothed within, along the 

 ridge formed by the impressed groove. 



The only specimen known is in the British Museum, and up to the 

 present time all endeavours to re- discover it have utterly failed. The 

 shell has much the general facies of some of our larger species, particu- 

 larly with H. Launcestonensis and H. Sinclair i, and I have no doubt but 

 that it will yet be found to exist in this island, although some collectors 

 are inclined to think that a mistake has been made by Pfeiffer in the 

 habitat as given. The shell has a great resemblance to the larger speci- 

 mens of H. Lamproides, so much so, that for a considerable time T con- 

 sidered the t'vo species identical. 



3. — Helix ( ) lamproides — Cox. 



Cox, Pro. Zool. Soc, 1867. 

 Mon. 1868, p. 28, pi. x, fig. 13. 

 Legrand, Col. for Mon., sp. 7. 



Shell umbilicated, convexly-depressed, thin, closely and irregularly 

 stria tely ribbed, above scarcely shining, below more so, horny-reddish, 

 paler beneath ; spire small, slightly convex ; whorls 4, quickly increasing, 

 last not descending, depressed above, beneath convex, bluntly angular ', 

 aperture oblique, lunately-rounded ; peristome simple, thin, margins con- 

 verging, right straight, angular in front ; columellar margin arched, 

 neither dilated nor reflexed. 



Diameter, greatest 0'57, least 0*50 ; height, 0-22 of an inch. 



Habitat — Table Cape, Circular Head, and Duck E,iver. 



The measurements of Cox are of immature, or at least stunted, 

 specimens from the vicinity of Circular Head. At the Duck River, in 



