AUST11ALIAN LAND SHELLS. 



35 



flattened at the base ; aperture oblique, rotundly-lmaate, shining 

 within; peristome simple, straight, margins slightly converging, 

 basal margin somewhat narrowed ; columella sloped, and near the 

 umbilicus, which is very narrow but perforate, slightly reflected. 



Diameter, greatest Q'31 ; least 0'27 ; height - 18 of an inch. 



Habitat. Cape York, North Australia. Edwards. 



The shell figured, exactly corresponds with Pfeiffer's description, as 

 here given ; but not with the figure and description of this species 

 given by Peeve, as copied in Plate XVII. Fig. 17. 



XVI. SECTION CYSTICOPSIS. Pfr. Vers. p. 133. 



* H. irradiata. 



90. Helix irradiata. Gould. 



Gould, Expedition Shells, p. 25. PI. 5. Pig. Go. 



Shell imperforate, conically globose, thin, whitish, above radiately 

 tesselated with purple, and striated with closely set acute lines of 

 growth, below rounded ; whorls 6, convex, the last somewhat 

 angular ; aperture transverse, lunate ; peristome acute, incurved 

 towards the columella, and scarcely reflected. 



Width, \; height, of an inch. 



Habitat. New Holland. Gould. 



The above description is taken from Gould. Pfeitfer states that it 

 neither agrees with the figure, nor the dimensions. 



XVII. SECTION POMATIA. Pfr 



* H. Victoria). 



* H. expeditionis. 



* H. marcescens. 



* II. monacha. 



Vers. p. 133. 



* H. 



* H. 



* H. 



* H. 



Grayi. 

 coriaria. 



subgranosa. 



hesa. 



H. 

 H. 

 H. 

 H. 



Mulgorc. 

 Scotti. 



Stutchburyi. 

 Greenhilli. 



Plate VI. 



Pig. 



5 ; Plate I. 



68. 



Figs. 1 

 M.C. 



91. Helix Grayi. Pfr. 



and 9 ; and Plate X. Fig. 

 Pfr., Symbola; Vol. IIP, p. 

 Reeve, Con. Icon. sp. 755. 



Shell with the umbilicus partially concealed, globosely-depressed, 

 rather thin, striated and granulated all over, of a pale horny -yellow; 

 the suture and basal area of a purple-chestnut, with the spire very 

 little elevated ; whorls 5 to 5i, somewhat convex, the last reflexed 

 for a short distance in front, umbilicus narrow ; aperture lunate, 

 circular, lip slightly rose-coloured within ; peristome simple, right 

 margin straight, the columellar margin dilated, reflected, and rose 

 coloured. 



Diameter, greatest 1*15 ; least POO; height 0*95 of an inch. 



Habitat. Brisbane Water. Ash Island. Hunter Eiver. Clarence 

 River, and other rivers as far as Brisbane, north of Sydney. 

 Also as far south of Sydney as Ulladulla, but never far from the sea 

 coast. Cox. 



As a general rule this species is easily distinguished by the purple-red 

 band which surrounds the umbilicus, and follows the suture ; but 

 by relying on this character alone, it is apt to be confounded with 



