8 Scientific Proceedings, Royal Dublin Society. 



Several forms of this well-known species are contained in the 

 collection. Large typical specimens were obtained at Somerset, 

 Cape York ; smaller examples, referable to H. semicastanea ^ of 

 Pfeiffer, were also collected at that locality and others, still more 

 aberrant from the normal form, with the spire less elevated, and 

 the body- whorl more compressed, were met with at Mer, Murray 

 Islands. The aperture in this form is much more contracted and 

 semilunate. 



The distribution of this species and of its variety semicastanea 

 will be found in Cox's " Monograph of the Australian Land Shells," 

 pp. 54 and 56. Pfeiffer^ has figured a pale unicolorous variety, 

 but has not particularized the locality. In Cuming's collection in 

 the British Museum there are two similar specimens from Lizard 

 Island, collected by Macgillivray. 



Sahitat. — Cape York, Albany Island, C. Direction, 0. G-renville, 

 Daintree Eiver. 



H. nicomede^ and H. beddomce,^ Brazier, from North Queens- 

 land, appear to be allied species. 



Helix {Hadra) arthuriana. 



Cox, 1873, Proc. Zool. Soc, p. 564, pi. xlviii., figs. 1, la. 

 Habitat. — L. Island, Torres Straits. [? Long Island, A. C. H.] 



Helix {Hadra) mulgravensis. 



Brazier, 1872, Proc. Zool. Soc, p. 21, unfigured. 

 Habitat. — Mulgrave Islands. 



Helix [Hadra] aureedensis. 



Brazier, 1871, Proc. Zool. Soc, p. 640, unfigured. 

 Habitat. — Aureed Islands. 

 Helix [Hadra] challisi. 



Cox, 1873, Proc. Zool. Soc, p. 565, pi. xlviii., fig. 3. 

 Habitat. — L. Island. 



1 Pfeiffer, 1849, Zeitschr. Malak., p. 77 ; Eeeve Conch. Icon. sp. 1348 ; Cox, 1868, 

 Monogr., p. 66, pi. v., fig. 10; PfeifFer, Monogr., Helic. iii., p. 222; Brazier, Proc. 

 Linn. Soc. N. S. W., i., p. 124. Islands of Torres Straits. 



^ Novitates Conchologicje, iii., pi. cvii., fig. 1. 



s Brazier, 1878, Proc. Linn. Soc. N. S. W., iii., p. 79, pi. viii., fig. 6 (Cardwell, 

 Gould Island). 



* Brazier, l. c, p. 80, pi. viii., fig. 7. 



