TASMANIAN LAND SHELLS. 51 



3. — YiTRiNA ( ) FUMOSA — Tenisou-Woods . 



Pro. Lin. Soc, N.S.W., vol. ni., p. 124, pi. xii., fig. 3, 3a. 



Shell umbilicate, turbinately discoid, rather thin, highly polished, 

 uneven from the lines of growth, intensely smoky, horn color or nearly 

 black throughout except at the apex, translucent ; spire somewhat 

 exsert, with the apex very slightly prominent ; suture very finely cor- 

 rugated ; whorls 3 J, increasing rapidly, embryonal IJ, whitish, last 

 whorl largely rounded and sloping ; aperture almost orbicular ; peristome 

 horny, obtuse, incurved, margins disjoined from the umbilicus for about 

 one-third of the last whorl ; columellar acute, sloping ; umbilicus very 

 narrow and deep. 



Diameter, greatest 22, least 14 ; height, 18 mil. 



Habitat. — Duck River, Montagu E-iver, Mount Bischoff. 



I discovered this shell in the dense fern-tree scrubs of the Duck 

 River crawling among the decaying leaves on the ground. The animal 

 is somewhat active, and of a bright-red colour. It is in all probability 

 but a variation of the last species, and its perforation still further links 

 it to Jlelix atframentaria, the animal of which is also of the same colour. 

 Professor Ralph Tate is also of the opinion that it is but a variation of 

 the preceding ; and Professor F. W. Huttoii thinks that both, if to be 

 looked upon as distinct, should be more properly placed in the genus 

 Perijphanta. The Helix urnula (Pfr.) from New Zealand exactly 

 resembles it in form, but the surface of the shell is ot quite a different 

 structure — that being of a wrinkled, decussate character, whereas the 

 present is highly polished and only slightly uneven with lines of growth. 

 Lingual membrane large, teeth of much the same form and arranged on 

 the same plan as in Helix lampra and allies. 



h2 



