110 AUSTRALIAN LANU SHELLS. 



ovately-rounded, opal within, except opposite to the band, when it is 

 of the same colour ; peristome thickened, intensely black, and 

 coarsely granulated by large round black granules oasily recognised 

 without the aid of a lens, margin reflected, columellar margin not 

 toothed, broadly dilated and reflected, covering the umbilicus, 

 margins approached, joined by a thick black callus, spreading 

 over that portion of the body whorl which projects into the aperture 

 as far as can be seen, and having the same coarse granular aspect as 

 the peristome. 



Diameter, greatest 1*57; least 1-28 ; height 1*47 of an inch. 



Habitat. The Liverpool River, N. Coast of Australia. Edwards. 



This fine species, as well as the two following, were obtained during 

 Captain Cadell's recent expedition to the N. Coast of Australia, in 

 large numbers, at the locality mentioned. Closely allied to and 

 resembling Helix pomum, but easily distinguished from that species 

 by its black coarsely granular aperture, by the black band which 

 follows the suture, and by its transverse wrinkled sculptured surface. 



261. Helix Creedi. Cox. Plate XIX. Fig. 2, 2a. M.C. 



Shell deeply, openly, but rather narrowly perforated, globosely depressed, 

 finely striated by lines of growth, dull-fawn coloured, darker towards 

 the apex of the spire, ornamented by two brown bands, one forming 

 a fine dark margin to the suture, the second rather above the peri- 

 phery ; whorls 5-|, convex, the last rapidly increasing in size, rather 

 inflated, descending in front, spire slightly raised, margin broad, 

 impressed ; aperture oblique, thinly enamelled, shining and whitish 

 within ; peristome a little thickened and broadly reflected, margins 

 somewhat approached, joined by a thin shining callus ; columellar 



' margin dilated, slightly covering the umbilicus. 



Diameter, greatest 105 ; least - 82 ; height - 70 of an inch. 



Habitat. Cadell's Straits, N. Coast of Australia. Dr. Creed. 



262. Helix Wesselensis. Cox. Plate XIX. Fig. 4, 4a, 4b. M.C. 



Shell deeply, openly, and rather broadly unibilicated, globosely 

 depressed, white, thin, transparent, shining, very faintly striated by 

 lines of growth, ornamented by two orange-brown bands, one very 

 narrow, forming a margin to the suture below, the second narrow 

 above the periphery ; whorls 5, flat above, rounded, and rather 

 dilated below, gradually increasing in size till the last turn, when 

 it becomes flattened on the side and narrowed, and towards the 

 peristome sharply reflected and constricted below, forming a broad 

 deep channel running into the umbilicus ; suture deep, broad ; 

 aperture ovately rounded ; peristome thin, margins much approached, 

 unconnected by a callous deposit, right margin slightly everted, left 

 and columellar margin broadly reflected, arching over the channel 

 running into the umbilicus, formed by the constriction of the last 

 whorl. 



Diameter, greatest 0*83 ; least 0-65 ; height - 40 of an inch. 



Habitat. Wessel Islands, near the N. Coast of Australia. Dr. Creed. 



