96 AUSTRALIAN LAND SHELLS. 



thin, horny, round, panci-spiral with thin prominent 

 lamina? on their external edges. 

 Animal like Cy do pi tor us. 



* D. Bensoni. * D. Australia). 



232. Diplornmatina Bensoni. A. Adams. Plate XVI. Fig. 

 1 natural size, 1 a., lb. magnified. M.C. 

 A. Adams, Pro. Zool. Soc, 1852, p. 94. 



Shell sinistral, imperfectly rimate, cylindrically ovate, pupiforru, with 

 regular, distant, oblique, prominent, continuous, or nearly so, libs 

 crossing the whorls, the interstices under the lens finely transversely 

 striated, white, not shining ; whorls convex, 1st papillose, 2nd very 

 much broader, 3rd, 4th, and 5th suddenly enlarging and tumidly 

 convex, 4 and 5 widest and equal, but last projecting more behind, 

 last whorl contracted ; aperture vertical, circular ; peristome porcel- 

 laneously white, outer portion slightly expanded, inner separated 

 by a groove straight, slightly expanded on the right lip. 



Length 0-12 ; breadth, 0-07 of an inch. 



Habitat. Moreton Bay, Queensland. Strange. 



Two specimens which the Rev. R. L. King has obligingly lent me are 

 marked as from the Clarence River, N. S. W. The rimation or sub- 

 stitute for an umbilical opening is, in this species, confined to a 

 slight shallow hollow. A Norfolk Island species, not yet named, 

 approaches more closely to the present than any of the four Lord 

 Howe Islaud Diplornmatina' described by Pfeiffer, although the latter 

 locality is within a day's steaming of New South "Wales, and the 

 former five times as far distant. 



233. Diplornmatina Australise. Benson, Plate XVII. Fig. 

 7, 7 a., 7 b. much magnified. Australian Museum. 

 Benson, in Ann, and Mag., Nat, His., 2nd Ser., XV., p. 331, 1855. 



Shell sinistral, rimate, sub-ovately-conical, glabrous, faintly ribbed, 

 pale horn} r ; spire ovately-conical, apex rather acute ; w r horls 6, con- 

 vex, last narrowed, ascending in front ; aperture vertical, sub- 

 circular ; peristome double, posteriorly expanded, anteriorly rather 

 expanded, margins shining, diaphanous, joined by a callus, exterior 

 margin shortly produced above, columellar margin dilated with a 

 tubercle inconspicuous or obsolete. Operculum remote, squarish, 

 plate scarcely raised. 



Length - 13 ; breadth scarcely 0'07 of an inch. 



Habitat. Mount Warren, Point Danger, Eastern Australia. Strange. 



Sub-order II. ECTOPHTHALMA. Pfeiffer. 



Mon. Pneum, Viv., 1852, p 14. Siijyrf. jorim. 1858, p. 14. Suppl. Sec, 

 1865, p. 13. 



Eyes placed at the external base of the tentacles ; foot 

 snb-elongated. Opercnlnm horny or testaceous, distinctly 



