AUSTRALIAN LAND SHELLS. 3 



South Australian specimens from Minder's Range, determined by 

 Angas to be of this species, present certain differences, being of a 

 duller aspect, more coarsely marked, and depressed. My specimens 

 from Rapid Bay are normal. 



3. Helix circumcincta. Cox. Plate V. Fig. 6 a. natural size, 

 6 b. magnified. M.C. 

 Helix marmorata. Cox, Catalogue of Australian Land Shells, 1864, p. 20. 



Shell minutely perforated, depressly and roundly-convex, thin, very 

 smooth and shining, with microscopic spiral and transverse lines 

 along the suture and centre of last whorl, reddish-horny, pale about 

 the umbilicus ; spire widely and flatly conical, very obtuse ; suture 

 obscurely margined ; whorls 5, gradually increasing, the last 

 rounded ; aperture diagonal, broadly lunate ; peristome simple, thin, 

 the columellar margin very slightly reflected above, and sometimes 

 partially concealing the umbilicus. 



Diameter, greatest 0*40; least 0*35 ; height 0'15 of an inch. 



Habitat. Kiama. Masters. Along the shaded banks of the Nepean 

 River, New South "Wales. Co.r. 



As my former name marmorata, applicable to the animal, was found to 

 have been in previous use, it is necessary to change it. Closely 

 allied to the preceding, of which it would seem to be the southern 

 representative. In one or two of my specimens there is even shown 

 a tendency to opacity round the umbilicus, and to the white callosity 

 of the upper part of the columella. The pale band seems to be con- 

 stant. Specimens of this shell sent to Cuming for comparison were 

 returned with the name H. misella, Per. an imperforate species, with 

 the last whorl carinated, and having an angularly lunate mouth. 



4. Helix Waterhousei. Cox. 



Helix sub-angulata, Adams and Angas, Pro. Zool Soc., 1863, p. 521. 



Shell orbicularly-conoidal, very thin, pellucid, glassy, pale straw 

 coloured, narrowly umbilicated; whorls flat, very finely concen- 

 trically striated, last somewhat angular at the periphery ; aperture 

 very oblique, lunately oval, broader than long ; lip acute, shortly 

 reflected, scarcely covering the umbilicus. 



Length ^ line ; breadth 3 lines. 



Habitat. South Australia, under stones and logs. Angas. 



A small species, somewhat resembling LT. rustica, Pfr., but with the 

 last whorl sub-angular at the periphery, and with a narrow um- 

 bilicus which is nearly concealed by a short reflexion of the colu- 

 mellar margin. 



The description is entirely taken from the work quoted above. The 

 specific name given by Adams and Angas had, however, been applied 

 in 1854, by Pfeiffer, to a Tasmanian species. A new name is there- 

 fore necessary. 



5. Helix microcosmos. Cox. Plate VIII. Fig. 12, natural 

 size and magnified. M.C. 

 Helix microscopica. Cox. 



Cox, Catalogue of Australian Land Shells, 1864, p. 21. 

 Shell perforated, depressly-globose, thin, transparent, not shining, 



