M"r</hifU<i.] GASTROPODA. 459 



above, regularly contracted towards the base ; aperture not very 

 high, narrow, very little emarginate at the base ; outer lip without 

 an upper sinus, with a thick varix, crenate inside, the denticles mostly 

 distant and the uppermost more prominent than the others ; colu- 

 mella with 4 plaits, the two upper ones transverse, the others oblique ; 

 inner lip indistinct, sometimes with a well-marked callosity above. 



3. Marginalia Allporti, T. -Woods, 1876. Plate 20, fig. 11. 



Mnrgimlla All port i, T.-Woods, P.R.S. Tas., 1875 (1876), 28; Tate and 

 May, P.L.S. N.S.W., 1901, 362, pi. 2(5, f. 80 ; Hedley, Rec. A.M., vi. 

 295. 31. kem.blen.sift, Hedley, Mem. A.M., iv, 365, f. 88. 



Shell small, biconical, thin, translucent, glossy, smooth, white, 

 usually with 2 brown spiral bands. There is no sculpture. Colour 

 yellowish-white, a narrow upper and a broader lower spiral band of 

 rufous mostly present, or. if absent, 2 brown spots usually remain on 

 the outer lip. Spire elevated, conic, with a blunt apex, its height a 

 little less than that of the aperture. Protoconch flatly rounded. 

 Whorls 5, lightly convex, sometimes somewhat constricted below 

 at the suture ; the last whorl large, moderately convex, narrowed 

 towards the base. Suture superficial. Aperture oblique, narrow, a 

 little channelled above, roundly truncated below. Outer lip almost 

 straight, slightly retrocurrent towards the suture, with a distinct 

 varix, with 1 or several tubercles inside, the uppermost more pro- 

 minent. Columella oblique, with 4 subequidistant oblique strong- 

 plaits, the upper two more transverse. Inner lip usually extending 

 some distance over the base just outside the plaits. 



Diameter, 2-5 mm. : height, 4-6 mm. 



Animal unknown. 



Type in the Tasmanian Museum, Hobart. 



Hob. Five miles south of Cuvier Island, in 38 fathoms (Captain 

 Bollons) ; near Little Barrier Island, in 20 fathoms (R. H. Shake- 

 spear) ; near Channel Island, Hauraki Gulf, in 25 fathoms ; Lyall 

 Bay (A. Hamilton). 



Subgen. 2. VOLVARINA, Hinds, 1844. 

 Volvnrina, Hinds, P.Z.S., 1844, 75. Type : Marginella triticea, Lam. 



Shell small, cylindrical or narrowly ovoid ; spire short, conoidal, 

 the apex obtuse ; whorls slightly convex, the suture indistinct, the 

 last whorl forming five-sixths or seven-eighths of the total height, 

 lightly oval, attenuated towards the base ; aperture very high, con- 

 tracted above and lightly channelled, truncated and not emarginate 

 below ; outer lip a little arcuate, but little thickened, contracted near 

 the middle, without an outer varix, smooth inside, retrocurrent towards 

 the suture ; columella with 4 oblique plaits, which are situated rather 

 low down. 



