BY C. H ED LEY. 



261 



and the same district, proposed to call it Helix villaris. Reeve 

 not only adopted this name, but anticipated Pfeiffer's publication 

 of it by seven months. 



A South Australian form, Thalassia cyrtochila Gude,* was 

 identified with M. rustica by Angas and Tate.f It has the same 

 general appearance, but differs in detail by having a wider umbil- 

 icus, not spirally striated within, not overhung by a bent colu- 

 mella, and by having a whorl less. 



To the north, M. rustica is succeeded by M. kreffti Cox,:; 

 darker in colour, twice the diameter and with a straighter colu- 

 mella. This seems to merge into a banded variety occurring 

 in New Guinea and some of the Torres Straits Islands, which 

 Brazier has described as Helix annulus, and Tapparone Canefri§ 

 as Nanina orhiculum. 



From Port Moresby, in New Guinea, Petterd has doubtfully 

 recorded M. rustica.\\ 



Helix yorkensis Pfeifier, is distinguished by the subangled 

 periphery and delicate strise.U 



Soutli of the tropics are two novelties here described. Still 

 further south is M. ductilis Pfeiffer,** from the Drayton Range, 

 with which I am not acquainted. Also M. stibrugata Pfeiffer, of 

 which moretonensis Pfr., pudihunda Cox, and Clarencensis Cox, 

 seem to me to be slight varieties. 



Mr. S. W. Jackson found M. rustica under logs, in an Ironbark 

 forest, at Tolga, south-west of Cairns; also a small dark variety 

 under leaves, in dry dwarf scrub, at the Botanic Gardens, Bowen. 



*Gude, Journ. Malac, xii. , 1895, p. 12, Pl.iii., f.2. 

 I Angas, Proc. Zool. Soc, 1863, p.52I; Tate, Trans. Austr. Assoc. Adv. 

 Sci., i., 1889, p.336; and Trans. Roy. Soc. S.A., xxiii., 1899, p.248. 

 tCox, Monogr. Aust. Land Shells, 1868, p.2, Pl.x., f.8, as H. villaris Pfr. 

 § Brazier, Proc. Linn. Soc. N. S. Wales, i., 1876, p. 100; Tapparone 

 Canefri, Ann. Mus. Gen., xix., 1883, p.204, PI. v., f. 16-18. 

 il Petterd, Journ. of Couch., i., 1878, p 396. 

 If Pfeifier, Conch. Cab., 2nd Ed., Helix, p.561, PI. 167, f. 13-15. 

 **Cox, Monogr. Austr. Land Shells, 1868, p.lO, Pl.xix., f.5. 



