18/1.] MR. J. BRAZIER ON SEVEN NEW SPECIES OF HELIX. 697 



I have very often received this species under the name of //. 

 legrandi, Cox ; the species described by Cox is allied to H.juloidea, 

 Forbes, which with Helix onslowi and H. rotefta, Brazier, belong to 

 the subgenus Charopa, whereas H. petterdi is quite distinct from 

 any other known species from Tasmania. 



3. Helix (Pitys) assimilis. 



Shell widely umbilicated, subdiscoidal, thin, diaphanous, glassy, 

 shining, regularly and obliquely finely ribbed throughout, interstices 

 as seen under the lens finely striated, dirty brown ; spire very little 

 raised, apex obtuse, suture impressed ; whorls 5 to 5|, moderately 

 convex, last convex, descending a little in front, base convex ; umbi- 

 licus wide and moderately deep, rounded at the bottom ; aperture 

 oblique, roundly lunate; peristome simple, straight, acute; margins 

 rather distant, right very little expanded, columellar margin not re- 

 flected. 



Diam. maj. 1|, min. 1}, alt. f- line. 



Hab. Near Hobart Town, Tasmania {Petterd). 



This species differs from H. petterdi in being finely ribbed, and 

 in having the interstices finely striated ; the preceding species is 

 finely striated throughout with lines of growth, the interstices being 

 scarcely perceptible. 



4. Helix (Pitys) subrugosa. 



Shell rather widely umbilicated, somewhat depressedly orbicular, 

 thin, shining, reddish-horny, subrugosely and obliquely striated, the 

 interstices much more finely striated ; spire very little elevated, apex 

 obtuse, suture channelled ; whorls 5|, moderately convex, last flat- 

 tened above the periphery in form of a furrow, the groove being di- 

 stinctly seen in front ; umbilicus wide at the top, three fourths of 

 the diameter, base convex, striated the same as the upper surface ; 

 aperture nearly diagonal, subtriangularly ovate ; peristome simple ; 

 margins distant, right straight, sloping and expanded, basal slightly 

 thickened and reflected. 



Diam. maj. 1|, min. 1£, alt. 1 line. 



Hab. Near Hobart Town, Tasmania {Petterd). 



This beautiful little species I received from Mr. W. Petterd ; it 

 may be distinguished very easily by the bold projection of the ribs, 

 and by the interstices being of finer sculpture ; the last whorl above 

 the periphery is also depressed and has a furrowed appearance. 



5. Helix (Videna) floodi. 



Shell deeply and widely umbilicated, convexly depressed, thin, 

 translucent, not shining, finely and irregularly striated with silky 

 striae, and, as seen under the lens, minutely spirally striated, light 

 horny green, nearly white ; spire rather small, very little elevated ; 

 whorls 5, moderately convex, last very large and inflated, roundly 

 convex, not descending in front ; base convex, striated the same as 

 the upper surface ; aperture diagonal, lunately rounded ; peristome 



