22 AUSTItAUAX LAND SHELLS. 



The lips are sometimes faintly joined by a callus, and the shell exhibits 

 variation in tho distinctness of its arched ribs which are sometimes 

 obsolete. 



54. Helix Tasmaniae. Cox. Plate XII. Fig. 4, natural size and 

 magnified. Australian Museum. 



Shell widely umbilicated, depressed, each whorl regularly marked 

 above with alternate dark-chestnut and light segments ; regularly 

 and strongly ribbed ; thin, spire slightly raised ; whorls 5, flatteued 

 towards the suture, the last a little descending in front, base con- 

 vex ; umbilicus deeply funnel-shaped ; aperture roundly-dilated, 

 lip simple, sharp, margins closely approaching, columellar margin 

 not dilated at its base. 



Diameter, greatest 013; least 0-11 ; height 0-07 of an inch. 



Habitat. Mount Wellington, Tasmania. Masters. 



55. Helix Hobarti. Cox. Plate XII. Fig. 11, natural me and 



magnified. Australian Museum. 



Shell openly and deeply umbilicated, depressed, dusky-brown, closely 

 and regularly transversely ribbed ; spire only slightly elevated 

 principally produced by the depression of the last whorl ; whorls 

 'H, rounded ; base convex, with a funnel-shaped umbilicus ; aper- 

 ture almost round ; peristome simple, margins closely approxima- 

 ting, no evertion of the columellar margin. 



Diameter, greatest 01 2 ; least 0-09 ; height 0*05 of an inch. 



Habitat. The Domain, Hobart Town, Tasmania. 3/asters. 

 Closely allied to H. Morti, of New South Wales. 



56. Helix CUprea. Cox. Plate XII. Fig. 9, natural size and 

 magnified. Australian Museum. 



Shell with a deep, rather large umbilicus, discoid ; spire flat, but not 

 impressed ; of a light copper colour, with metallic lustre ; whorls 

 4-i- to 5, gradually increasing, last whorl rounded, closely and finely 

 striated above and at the base, suture broad, last whorl slightly 

 depressed in front ; aperture rounded ; lip simple, margins approxi- 

 mating, columellar margin at the base very slightly everted. 



Diameter, greatest 0-10 ; least 0'08 ; height 0-06 of an inch. 



Habitat. King George's Sound, W. Australia. Masters. 



57. Helix Melbournensis. Cox. Plate XII. Fig. 10, natural size 

 and magnified. Australian Museum. 



Shell umbilicated, depressly-globose, finely and regularly striated, 

 converging towards the umbilicus, uniformly brown, lighter below 

 than above ; whorls 4^, rounded, gradually increasing, suture im- 

 pressed, spire moderafely elevated ; aperture lunately- rounded ; lip 

 simple, margins converging, columellar margin broadly reflected at 

 its base, covering the umbilicus. 



Diameter, greatest - 20 ; least 0-17 ; height 0-14 of an inch. 



Habitat. Melbourne, Victoria. Masters. 



