HELIX-CHAROPA. 109 



Var. ALBA Hedley. 



Entirely hyaline-white. Occurred with the above. 



P. GADENSIS Beddome. PI. 35, figs. 16-18. 



Shell thin, transparent; contour discoidal, spire plane. Color 

 hyaline-amber, unicolorous. Whorls 82, rather rapidly increasing, 

 deeply channelled at the suture, rounded on their summits and at 

 the periphery, flattened somewhat on the base. Sculpture : embry- 

 onic whorls comprising the first li revolutions delicately sculptured 

 by faint transverse capillary costee, the adult whorls are ornamented 

 by -fine capillary costse, of which the last whorl bears about 175. 

 These are directed straight across the whorl, and are everywhere 

 crossed by very minute raised hair-lines, which within the umbilicus 

 grow coarser and dominate the transverse lines. Umbilicus about 

 a third of the diameter of the base, deep cup-shaped, margin 

 rounded. Aperture slightly oblique, roundly lunate, peristome 

 straight, sharp, projecting at the periphery, scarcely reflexed on the 

 columellar margin. Callus projecting, bluish-white, thin, just bury- 

 ing the costse of the preceding whorl. 



Diam. maj. 2, min. If, alt. f mm. (Hedley.) 



From Gad's Hill to Mt. Buchoff, Tasmania (Beddome) ; occurred 

 in and under decayed timber. 



H. gadensis Beddome, Monograph of the Land Shells of Tasmania, 

 p. 29 ; Proc. Roy. Soc. of Tasmania, 1879, p. 23. Charopa gadensis 

 HEDLEY, Proc. Linn. Soc. N. S. Wales, 1892, t. 2, f. 1-4. 



The type is in the collection of C. E. Beddome, Esq. My figures 

 and the above description are from advance proofs of an article by 

 Mr. Charles Hedley. 



P. BISCHOFFENSIS Beddome. PI. 35, figs. 19-22. 



Shell thin, globose, slightly gibbous, very narrowly perforated. 

 Color brown, some specimens darker than others ; the last whorl 

 apparently darker than its predecessors. Whorls 5J, slowly increas- 

 ing, the penultimate wider than the final when seen from above, 

 channelled at the suture, tumid beneath it; last whorl gradually 

 and slightly ascending at the aperture, rounded at the periphery 

 and on the base. Sculpture everywhere closely ornamented by 

 microscopic transverse raised hair-lines, whose interstices are latticed 

 by smaller spiral lines ; upon the base there are distinguishable some 

 thirty faint and irregular spaced costse, but this primary sculpture 



