AUSTRALIAN LAND SHELLS. 43 



109. Helix Dunkiensis. Forbes. Plate VIII. Fig 9. Aus- 

 tralian Museum. 



Forbes, Voy. Rattlesnake, Vol. II., p. 378. 

 Reeve, Cone. Icon. sp. 756. 



Shell umbilicated, depressly-globose, solid, rather glossy, closely 

 striated, minutely granulated, pale yellow ; spire convexly-conoid, 

 obtuse ; whorls 6, moderately convex, slowly increasing, last sud- 

 denly deflected in front, very faintly carinated, rather inflated at the 

 base; aperture diagonal, roundly-lunate, margins slightly approach- 

 ing, white within ; peristome with the basal and columellar margins 

 slightly expanded and reflected, slightly dilated above, and covering 

 \ of the deep moderately sized umbilicus. 



Diameter, greatest l - 40 ; least 1*15 ; height 0-70 of an inch. 



Habitat. Dunk Island, North Australia. MacGillivray. 



The above description, agreeing with that of Forbes, has been taken 

 from a very fine authentic specimen, presented to the Australian 

 Museum by the original collector. The descriptions of Pfeiffer and 

 Reeve do not agree with each other, although professedly derived 

 from the same source, viz., the Cumingian collection. Reeve's 

 description and figure have certainly not been taken from Dunk 

 Island specimens. 



110. Helix prunum. Ferussac. Plate IV. Fig 6. Australian 

 Museum. 



Ferussac Hist. Moll. PL 26. Fig. 78. 



Reeve, Cone. Icon. sp. 353. 



Helix argillacea. Gray, not Ferussac. 



Helix pelodes, Pfr., Pro. Zool. Roc, 1845, p. 126. 



Shell umbilicated, somewhat depressly-globose, rather thin, somewhat 

 shining, finely rugosely striated, and minutely granulated, pale flesh 

 coloured, tinged with pink above; spire short, moderately obtuse ; 

 whorls 6, convex, rapidly increasing, last inflated, in front slightly 

 descending ; below paler, umbilicus moderate, deep ; aperture ob- 

 lique, Innately-circular, within pearly pink ; peristome straight, 

 expanded, margins somewhat approximating, columellar margin 

 much dilated above, and ^ concealing the umbibcus. 



Diameter, greatest 1*20; least TOO; height 0-70 of an inch. 



Habitat. Port Essington on bark of the native tea tree Melaleuca. 

 Mac GilUvray. 



The preceding description has been taken from two specimens in the 

 Australian Museum, collected by the late Mr. MacGillivray, who in- 

 formd me that much of the pink or rosy hue had faded during the last 

 sixteen years. Eeeve's figure represents this shell, but Ferussac's 

 two most assuredly do not. It agrees with Pfeiffer' a description of 

 H. pelodes, which he himself has finally merged into H. prunum. A 

 shell sent to me by the late Mr. Cuming as " II. prunum, Port 

 Essington," and figured PI. IV., Fig. 4, appears to be H. argillacea, 

 Fer., from Timor, where it is abundant. I have never known a 

 specimen of E. argillacea yet found on the Australian continent. 



