AUSTRALIAN LAND SHELLS. 59 



descending in front ; aperture roundly-lunate, diagonal ; peristome 

 white within, straight, slightly expanded and reflected ; columella 

 dilated above and ^ covering the moderately sized and pervious 

 umbilicus. 

 Diameter, greatest 0*65 ; least - 50 ; height 0-30 of an inch. 



Habitat. Frankland Isles, N.E. coast of Australia. MacGillivray. 

 Double Bay, Sydney, N.S.W., in gardens. Cox. 



In the last mentioned locality, where Mrs. Forde first observed it as a 

 novelty, it occurred in Mr. Guilfcyle's nursery, and was doubtless an 

 importation among soil with plants. With reference to the locality 

 on the Frankland Isles, the late Professor E. Forbes suggested that it 

 might have been carried thither by floating timber, which is ex- 

 tremely probable. It is pre-eminently a wanderer, as will be seen 

 by the list of places, widely separated, where it has been found : 

 Cuba, Brazil, Reunion, Mauritius, Natal, Java, Bengal, China, 

 Sandwich Islands. 



147. Helix mansueta. Pfr. Plate II. Fig. 4. M.C. 



Pfr., Pro. Zool. Soe., 1854, p. 57. 

 Reeve, Cone. Icon. sp. 1304. 



Shell umbilicated, orbicularly-depressed, rather thin, diaphanous, very 

 closely but almost obsoletely striated and under the lens, minutely 

 granulated, without lustre, deep vinous-chestaut ; spire short, 

 broadly-conical, rather acute at the apex, suture impressed ; whorls 

 5, convex, very gradually increasing, last nearly descending in front, 

 rounded ; umbilicus moderate, perspective ; aperture diagonal, 

 lunately-oval ; peristome usually pale or coloured, not thickened, 

 very briefly expanded, margins rather approximating, columellar 

 margin slightly triangularly dilated above and reflected. 



Diameter, greatest O70 ; least 0*55 ; height - 30 of an inch. 



Habitat. Moreton Bay, Queensland. Masters. Richmond River, 

 N. S. W. Mac Gillivray. 



Perhaps the descriptions of Pfeiffer and Reeve, which frequently dis- 

 agree, were taken from a single specimen. None of mine shew any 

 angularity on the periphery as stated by them, but not shown on 

 Reeve's figure, nor are there either pale or dark markings about the 

 umbilicus, as mentioned by these writers. All the specimens which I 

 have seen are concolorous, and of a vinous hue. 



148. Helix mucida. Pfr. 



Pfr., Pro. Zool. Soc, 1856, p. 329. 



Shell umbilicated, turbinately-depressed, rather thin, finely striated, 

 deep red, appearing as if spread over with mould ; spire conoid, 

 rather blunt ; whorls 5, convex, gradually increasing, last rounded, 

 descending in front, sub-angular around the funnel-shaped um- 

 bilicus ; aperture nearly diagonal, roundly lunar, shining flesh-colour 

 within ; peristome briefly expanded, margins scarcely converging, 

 columellar margin triangularly dilated above and spreading. 



Diameter, greatest - 79; least 065 ; height 0*43 of an inch. 



Habitat. Percy Isles, N. E. Coast of Australia. Chimmo. 



