42 AUSTRALIAN LAND SHELLS. 



columellar margin much dilated, white, shining, reflected, -| con- 

 cealing the narrow umbilicus. 

 Diameter, greatest 0*67 ; least 055 ; height 051 of an inch. 



Habitat. Cygnet Bay, North Australia. Pfeiffer. South Australia. 

 Reeve which is undoubtedly a mistake, Mr. Gb F. Angas having lately 

 found inside the specimens now in the British Museum a label 

 marked in Lieut. Dring's own handwriting, "Cygnet Bay, N. 

 Australia." 



Reeve remarks of this species, that it is a light globose shell, encircled 

 round the middle and upper part with three or four delicately 

 painted brownish-red bands. Its closest affinity is with U. oitceniata 

 of South Australia. 



107. Helix Forsteriana. Pfr. Plate IV. Fig. 8. M.C. 

 Pfr., Pro. Zool. Soc, 1851. 



Peeve, Cone. Icon. sp. 439. 



Shell umbilieated, depressly-globose, rather thin, above finely granu- 

 lated throughout, reddish-brown of various tints, encircled by two 

 pale yellowish bands ; spire not much elevated, convexly-conical ; 

 whorls 6, slowly increasing, moderately convex, last roundly-convex, 

 descending in front; base convex, smooth, yellowish-white, um- 

 bilicus small, deep, a brown spot inside the columella ; aperture 

 diagonal, sub-ovately-lunate ; peristome simple, straight, margins 

 scarcely approaching, slightly expanded and reflected anteriorly, 

 and more so along the columella which is dilated above. 



Diameter, greatest l - 25 ; least 1-10 ; height - 70 of an inch. 



Habitat Islands off the N.E. coast of Australia. IlacGiUivray. 



Although subject to considerable variation in size, distinctness of the 

 bands, and in other respects, this shell does not merge into anj r 

 other species. It should come next to H. Grayi, but it is always a more 

 depressed shell. The largest specimens in my collection are from 

 the Howick Isles, including a beautiful albino variety, which might 

 be mistaken for H. Dunlciensis, and the smallest from the Percy Isles, 

 in which last, the depressed form, the granulated surface, the bands 

 and the columellar spot are perfectly distinct. 



108. Helix torillus. Ferussac. Plate XL Fig. 5, copied from 



Ferussac. 



Ferussac, Hist. Moll. PI. XXVII. Fig. 3-4. 



Shell sub-perforated, globular, white, smooth, surrounded by a small 

 transverse brown band, inflated at the base ; whorls 6, convex, 

 narrow ; aperture small, roundly-lunate ; pei'istome simple, white, 

 upper margin sub-expanded, reflected, somewhat covering the perfo- 

 ration. 



Diameter, greatest 0G0 ; least - 51 ; height 0"43 of an inch. 



Habitat. New Holland. Ferussac. 



The description is from Pfeiffer's Mm. Hel. Viv., Vol. I, p. 238. 

 Judging from the figures, the shell appears to partake more of the 

 Polynesian than Australian type. The spire is small, conical, and 

 acute. 



