161 



iuhlente tantum bene conspictiis longitudinaliter impressa ; 

 pallide corneo-Iufea, unicolor, translucent ; spira leviter conica, 

 apice promimdo, obtuso ; sutura valic/e impressa; atifr. 6^, con- 

 vexi, sensim aecrescentes, emhryonales 1\, albidi, ultimus 

 rotundatus, hasi suhplanatus ; apertura rotundato-lunaris basali, 

 concolor ; peristoma simplex, acutum, corneum, onarcjinibus 

 ab umhilico usque ad \ ultimi anfr actus disjunct is ; columella 

 hrevi. Diam. maj. et min \\ ; alt. 1{- mil. Habitat in vicinio 

 civifatis Stanley dictce, Tasmanice. Obs. Sp. valde minuta et 

 sinistrosa, forma vera et colore specielus multis Tasmanice inco- 

 laiitibus sat proximo. 



Shell minute, sinistral, narrowly umbilicate, turbinately 

 discoid, rather thin, shining, with close small longitudinal 

 striae, which are only visible under the lens ; pale yellowish 

 horu and of uniform color, translucent ; spire slightly conical, 

 apex a little prominent, obtuse ; suture validly impressed ; 

 whorls Q\, convex, gradually increasing, embryonal whorls 

 H, whitish ; last whorl rounded and somewhat flattened, of 

 uniform color ; peristome simple, acute, horny ; aperture 

 roundly lunate, margins of the peristome separated from the 

 umbilicus to half the height of the last whorl, columella 

 short. 



Mr. Petterd notes with reference to this shell. " This 

 small and reversed Helix I have only observed at the foot of 

 the high rocks about Stanley, Circular Head, where I collected 

 it with a few other species of Helices on the surface of blocks of 

 rocks that are overgrown with a thick mass of entangled vege- 

 tation. It is exti'emely abundant and generally in clusters. 

 I have collected some hundreds of specimens. The reversed 

 form is verv constant." 



