peristome simple ; margins slightly approximating, basal margin 

 slightly dilated and reAexed."— Johnston, 1880. 



Only one fragmentary specimen of the numerous examples in 

 the Museum bears any trace of shell structure ; the remainder 

 are internal casts. The ornamentation of the shell fully bears 

 out Mr. Johnston's description, except that no spiral lines are 

 to be seen on the fragment alluded to. The casts present consider- 

 able variation in the elevation of the spire, occasionally, indeed, 

 being somewhat depressed, when they closely resemble the living 

 ffelix confusa, Pfr., of Queensland, North Australia, etc. In the 

 last-mentioned shell, however, certain adult forms attain to con- 

 siderable spiral elevation, especially in the specimens in the 

 Museum from North Australia. Judging from the sculpturing 

 and general aspect of the casts, it is highly probable that 

 IT. tasnianiensis should be classed in the subgenus Rhytida, but 

 the materials are not perfect enough to enable one to be quite 

 certain on this point. 



Mr. Johnston {op. cit. 1880, p. 89) describes two new species 

 of Helix from the same locality as the Museum specimens come 

 from : one of these, H. huxleyana, is very minute ; and the other, 

 S. geilstonensis, is described as orbicularly depressed, the whorls 

 being markedly convex below ; a variety of H. sinclairi is also 

 created which has, inter alia, a narrow umbilicus. Neither of 

 these is represented in the British Museum Collection. 



Dimensions (of the type specimen). — Height 22i mm. ; breadth 

 34 mm. 



Form, and Loc. — Yellow Limestone (Travertine), probably of 

 Pliocene age : all from the neighbourhood of Hobart Town, 

 Tasmania. 



96906. The type specimen figured by Sowerby. Purchased. 



46592-3. Two specimens. Presented hj Norton Allport, Esq. 

 98217. Two casts ; from Geilston Quarry. Purchased. 



G. 71. Several casts of adult specimens. Purchased. 



Genus LIPARITS, Albers. 



[Die Heliceen, 1850, p. 172.] 



Test ovately conical, with an obtusely conical spire, whorls to 

 the number of 6 or 7, aperture ovate, peristome simple, acute, 



