AUSTRALIAN LAND SHELLS. / 



callus, columellar extremely dilated, reflexed in a vaulted mauner, 

 adherent, and more or less completely shutting up the umbilicus. 

 Diameter, greatest 1/61 ; least 1*30; height 1*22 of an inch. 



Habitat. Cape Direction. Banner and MacGillivray. 



The above description has been wholly taken from Pfeiffer, as I have 

 no specimen to refer to ; the original, probably still unique, is part 

 of the Cumingian collection in the British Museum. 



V. SECTION MICROCYSTIS. Pfr. Vers. p. 122. 



* H. Jacksoniensis. * H. radians. 



13. Helix Jacksoniensis. Gray. Plate XI. Fig. 6, copied 

 from Reeve. 



Gray, Pro. Zool. Soc., 1834, p. 65. 

 Reeve, Cone. Icon. sp. 1462. 



Shell imperforate (scarcely minutely umbilicated, Reeve), depressed, 

 solid (horny, Reeve), slightly arcuately striated, reddish-yellow, 

 radiated with a deeper colour ; spire slightly elevated, obtuse, 

 suture margined ; whorls 5, scarcely convex, slowly increasing, last 

 not descending, flattened at the base, and impressed in the centre ; 

 aperture scarcely oblique, lunate ; peristome straight, somewhat 

 callous within, margins distant, columella slanting. 



Diameter, greatest - 29 ; least 0"27 ; height - 13 of an inch. 



Habitat. Near Port Jackson. Cunningham ? 



Never having seen this shell, of which I cannot help suspecting that 

 the locality assigned is wrong, I have given Pfeiffer' s description of 

 it from the British Museum specimen, and apparently also that 

 figured by Peeve, who remarks "An obtusely depressed, shining, 

 horny species, streaked and tinted with burnt red." In Gray's 

 original account, it is stated to resemble H. nitida in form, but to 

 be imperforate. His measurements are axis 3 lines ; diameter 

 Z\ lines. 



14. Helix radians. Pfr. Plate XVII. Fig. 2, copied from Reeve. 

 Pfr., Pro Zool. Soc, 1851. 



Reeve, Cone. Icon. sp. 618. 



Shell imperforate, depressed, thin, smooth, very shining, horny, 

 irregularly radiated with white streaks, spire very short, convex, 

 suture impressed, slightly margined ; whorls 4^, slightly flattened, 

 last not descending, angular above, convex at the base, slightly im- 

 pressed at the middle ; aperture sub-vertical, angularly lunate ; 

 peristome extremely simple, straight, acute. 



Diameter, greatest 0*35 ; least - 31 ; height 0'16 of an inch. 



Habitat. Port Jackson, Sydney. Strange. 



Description taken from Pfeiffer. Peeve remarks of it "An extremely 

 transparent bright horny species of simple character." He does not 

 allude to the white radiating streaks. Its claim to be Australian I 

 take from Pfeiffer's Mon. Sel. Yiv., Vol. IV., p. 17. 



