TASMANIAN LAND SHELLS. 25 



present, and in size it varies according to the more or less favourable 

 nature of the locality. The largest specimens that I have seen came 

 from Flinder's Island ; those got at Corra Linn are also very fine, much 

 more so than any I have seen in the southern portion of the island. 



In the " Pro. Zool. Soc. for 1870," Mr. Brazier alters the name of 

 the specimens called by Cox Atkinsoni to Midsoni, as the former is 

 pre-occupied by Theobald. 



It prefers , densely wooded situations, living among decaying tim- 

 ber and leaves on the ground ; and is not only abundant from the high 

 mountain ranges to within a short distance above the tidal influence, 

 but has also been obtained in a fossilised condition, with H. pictilis, in 

 rocks of Pleistocene age at the Furneaux Group, Bass Straits. 



37. — Helix ( ) marchian^ — Cox. 



Legrand's Col. for Mon., sp. 25, pi. i,, fig. 7. 

 H. Jusco-radiata — Cox. 



Legrand's Col. for Mon., sp. 61, pi. ii., fig. 2. 



Shell discoid, broadly and perspectively umbilicated, thin, trans- 

 lucent, glossy, pale horny -yellow, irregularly finely striated throughout, 

 very faintly marked with irregular transverse horn streaks ', whorls 4i 

 to 5, convex, very gradually increasing in size ; spire flat ; suture wide, 

 and rather deeply impressed, last whorl scarcely descending in front • 

 aperture oval ; peristome simple, thin ; margins approaching ; columellar 

 margin not dilated or reflected. 



Variety a. — Obsoletely rayed with chestnut. 



Diameter, greatest 0-19, least 0-16 ; height, 0'08 of an inch. 



Habitat. — Pecherche Bay, Brown's Piver, Springs (Mount Wel- 

 lington), Ben Lomond, Corra Linn (near Launceston), 

 Chudleigh. 



This is a very distinct species, distinguished from S. Diemenensis 

 by its glassy appearance, lines of growth, and much smaller size. On 

 Mount Wellington it is very rare, and only met with at an altitude of 

 about 2500 feet. On Ben Lomond it was got on the slopes in company 

 with H. lampra and H. Kingi, two species confined to the north. At 

 Corra Linn Mr. Johnston found specimens of a rather large size, many of 

 which were obsoletely rayed with numerous narrow bands of chestnut 

 colour. 



The specimens described under the name of H. fusco-mdiata (Cox) 

 are but the young of this species. 



E 



