14 AUSTRALIAN LAND SHELLS. 



appearing like two coalescent interstices, not striate under the lens, 

 pale yellowish-horny; spire flat, suture moderate ; whorls 4, convex, 

 the last narrow, rounded ; below slightly shining, the costse con- 

 tinued into the umbilicus, which is perspective, equalling -| of the 

 diameter ; aperture nearly diagonal, lunate ; peristome, simple, thin. 



Diameter, greatest - 08 ; least 07 ; height - 04 of an inch. 



Habitat. Greystanes, Prospect, near Parramatta, N. S. W. Cox. 



Easily distinguished from W. cochlidium by difference in colour, and 

 the fineness of the minute ribs, which are also very much more 

 numerous than in its white plicately-ribbed ally. The name is in- 

 tended to apply to the neat combed-out appearance of the little ribs. 



32. Helix Murrayana. Pfr. 



Pfr., Pro. Zool Soc, 1863, p. 527. 



Shell umbilicated, depressed, rather thin, very closely covered with 

 thread-like folds, scarcely shining, brown ; spire flat ; whorls 5, 

 rather convex, regularly increasing, last rounded, not descending ; 

 umbilicus equalling about ^ of the diameter ; apertiu'e slightly 

 oblique, roundly-lunate ; peristome simple, straight, margins con- 

 verging, columella scarcely dilated near the umbilicus. 



Diameter, greatest 0"27 ; least - 24 ; height 0-12 of an inch. 



Habitat. Murray Cliffs, South Australia, under stones and among 

 grass in the ledges. Angas. 



To Pfeiffer's description I may add that Angas speaks of it as a small, 

 flattened, finely plicate species, with a large umbilicus. 



33. Helix Br azieri. Cox. Plate XI. Pig. 18, natural size and 

 magnified. Mr. Brazier's Cabinet. 



Shell umbilicated, flatly discoid, thin, very closely and very finely 

 ribbed, with, under the lens, extremely faint parallel lines between 

 the ribs, and very much stronger decussating lines, ash grey, with 

 occasional dark lines and streaks across the whorls ; spire flat, 

 suture deeply impressed ; whorls 5, regularly increasing, last 

 equally rounded above and below ; base ribbed as iippet surface, 

 umbilicus i the width of the shell, perspective, very broadly conical 

 and rounded at the bottom; aperture nearly vertical, broadly lunate ; 

 peristome simple, acute. 



Diameter, greatest 9* 13 ; least - 10 ; height 05 of an inch. 



Habitat. Cook's Eiver, Sydney, N. S. W., under stones in dry places. 

 Brazier. 



Allied to DT. saturni and H. lirata. Its ash-grey colours and streaks 

 resemble the commonest forms of H. sericatula, and the enor- 

 mous proportional width of the umbilicus is very distinctive. 

 The markings, although somewhat difficult to describe clearly, are 

 characteristic. 



34. Helix Saturni. Cox. Plate VI. Pig. 11, natural size and 

 magnified. M.C. 

 Cox, Catalogue of Australian Land Shells, 1864, p. 35. 



Shell umbilicated, flatly discoid, thin, not shining, finely and promi- 

 nently ribbed, not very regularly, the interstices under the lens 



