AUSTRALIAN LAND SHELLS. 65 



a very thin callus, columellar margin much thickened above and 

 expanded. 



Diameter, greatest 2 - 00 ; least 1"60 ; height 1*10 of an inch. 



Habitat. Clarence and Richmond Rivers, N. S. W. Brisbane and 

 Wide Bay, Queensland. 



A variable shell. The preceding description applies to what I consider 

 to be the typical form, with black lip and decided markings. A 

 larger variety, of which one individual measures 2-25 ; 1*75 ; 1*70 of 

 an inch, is scarcely so brightly marked, and has the lip and colu- 

 mella of an obscure violaceous or livid hue. Reeve's figure and 

 Pfeiffer's description, Mon. Hel. Viv., Vol. I., p. 246, apply more 

 particularly to this variety. A very beautiful variety from the 

 Clarence River, smooth and glossy, the sculpture being reduced to 

 its minimum, is of an intense blackish-chestnut, gradually fading 

 into pale reddish-chestnut at the apex. Another variety, although 

 dark and unhanded below, has the spire pale, and finely spirally 

 lined ; and there are several others. 



162. Helix Mitchellse. Cox. Plate IX. Fig. 9. M C. 

 Cox, Catalogue of Australian Land Shells, p. 19, 1864. 



Shell imperforate, globosely-turbinated, solid, striated with the lines 

 of growth, under the lens universally reticularly or irregularly 

 linearly granulated, deep reddish-chestnut, with four yellow bands, 

 one broad in umbilical region, another narrow along the periphery, 

 with a blackish band above it. a third, broader and separated by a 

 dark band from a very narrow fourth at the suture ; spire roundly 

 convex, obtuse ; whorls 6^, very regularly increasing, convex, last 

 deflected in front, convex below ; aperture very oblique, truncately- 

 elliptical, within of a pearly bluish tint ; peristome thickened, lipped 

 within, reflected, inner edge glossy, chestnut black, margins con- 

 nected with a thin dark callus, anterior rather sinuated near the peri- 

 phery, columellar margin flattened, with a very prominent inner lip, 

 having an obsolete tooth-like callosity near the centre. 



Diameter, greatest l - 80; least l - 50; height 1*20 of an inch. 



Habitat. Clarence River, N. S. W. Mitchell. Beach Hut, Emmigrant 

 Creek, Richmond River, under masses of dead leaves. Cox. 



This fine species, the specimen of which described and figured, is from 

 the cabinet of Mrs. Mitchell ; but I have received since several fine 

 specimens from the locality above mentioned. It is extremely 

 interesting, from its wonderful resemblance in sculpture and colo- 

 ration to H. Dupuyana, a depressly-conical and carinated species. 

 We see here how, in two groups, or sections of the great genus 

 Helix, one in each beautifully represents the other. 



XXIX. SECTION GEOTKOCHTTS. Pfr. Vers. p. 145. 



* H. Dupuyana. * H. fucata. * H. Giirtneriana. 



* H. conscendens. * H. Poiretiana. * H. Nova3-Hollandia\ 



163. Helix Dupuyana. Pfr. Plate II. Fig. 5. M.C. 



33. Helix Dupuyana. Pfr. Plate II. Fig. 



Pfr., Pro. Zool. Soc, 1851, p. 159. 



Reeve, Cone. Icon. sp. 354. 



