TASMANIAN LAND SHELLS. 23 



34. — Helix ( ) Spiceri. N. Sp. 



Shell perforate, turbinately-globose, tliin, yellow-brown, shining ; 

 above obliquely striate and conspicuously decussate, base of body whorl 

 almost smooth and much more shining than upper surface ; whorls 5, 

 convex, gradually increasing in size ; spire obtusely-conical, last slightly 

 angled, not descending in front ; aperture irregularly-lunate ; peristome 

 thin ; margins distant, joined by a thin but distinct callus j columellar 

 margin slightly expanded. 



Diameter, greatest l^ ; height, 1 J mil. 



Habitat. — Xew Norfolk, Torquay, Mount Bischoff, Middlesex 

 Plains, Launceston. 



Of the same form as the preceding, but is conspicuously decussate, 

 more especially on the upper portion of the shell ; nevertheless I think 

 it may prove but a variety in this particular character, for upon ex- 

 amination of a large series of the two in question and H. Halli^ I am. 

 inclined to think them all of one species. This is quite different from 

 any recorded Australian form, and is the nearest in form found in this 

 island to the genus Pupa. 



35. — Helix ( ) Weldii — Tenison-Woods. 



Pro. Koyal Soc, Tasmania, 1876. 



Shell minute, sinistral, narrowly umbilicate, turbinately discoid, 

 rather thin, shining, with close small longitudinal striae, which are only 

 visible under the lens ; pale yellowish horn, and of uniform colour, 

 translucent ; spire slightly conical ; apex a little prominent, obtuse ; 

 suture validly impressed ; whorls 6 J, convex, gi^adually increasing ; em- 

 bryonal whorls 1|, whitish; last whorl rounded and somewhat flattened, 

 of uniform colour ; peristome simj^le, acute, horny ; aperture roundly 

 lunate ; margins of the peristome separated from the umbilicus to half 

 the height of the last whorl ; columellar short. 



Diameter, greatest 1 J ; height, l^^ mil. 



Habitat. — Stanley, Circular Head. 



Collected on the surface of blocks of rock that are overgrown by a 

 thick mass of entangled vegetation, in company with ff. coesus and H. 

 Stanley ensis.. 



From the fact of this minute species being constantly reversed it 

 cannot be mistaken for any other of our minute Helices. In general 

 foi-m and colour the nearest to it is H. Halli and H. parvissima, ex- 

 cepting, of course, the sinistral convolution. The only other reversed 

 Australasian species is H. Magei (Lambert), from New Caledonia, but that 

 shell is in other respects widely distinct. It appears to be strictly con- 

 fined to the habitat given, where it is anything but rare. The reversed 

 form is constant, and I did not meet with a single abnormal specimen. 



