92 



with four strong distant plaits. Dimensions. — Length 0.225, breadth 

 0.175 inch. 



M. infans (Reeve) makes some approach to M. hordeacea, but there 

 is no recent species so broadly ovate as it. The flatted underside and 

 the thick lip give it a striking character. 



Locality and Horizon. —Miocene limestones, upper part of Blanche 

 Point Cliff, Aldinga, South Australia. Very abundant ( Tate). 



5. — Margin flla dubia (Hutton), 

 Cat. Tertiary Moll, of New Zealand, 1873, No. 52, p. 8. 



" Ovato-cylindrical, spire short, smooth ; outer lip slightly thickened ; 

 axis, *6 ; breadth, -3. 



" Upper Eocene. — Broken River, Chatham Islands, N.Z. "(Hutton ) 



6. — Marginella albescens (Hutton), 

 Cat. Marine Moll, of N.Z., 1873, p. 19, No. 65. 



" Shell small, oval, translucent ; spire short ; aperture narrow ; 

 columella with four plaits, white. Length, '2 ; breadth, -1. 



" Upper Miocene. — Awamoa ; and Recent, New Zealand " 

 (Hutton). 



II. Outer lip dentate. 



(1) Columella quadriplicate. 



7. — Marginella Wentworthi (Tenison Woods), 

 Proc. Roy. Soc, Tasmania, p. 109, 1877- 



" Shell small, ovately oblong, tumid, smooth, shining ; spire exsert 

 obtuse ; whorls five, roundly angulate ; aperture narrow, oblong ; outer 

 lip much thickened, deeply channelled above, enamelled on the edges, 

 with numerous small tubercular teeth within the margin ; columella 

 with four plaits ; anterior aperture widely channelled." 



Locality and Horizon. — Miocene, Table Cape, Tasmania. — 

 (Johnston). 



Miocene. — Muddy Creek, Victoria (Tate), and R. Murray Cliffs 

 (Tate). 



Eocene Marls. — Blanche Point, Aldinga, South Australia (Tate.) 

 Common in all localities. 



M. Wentworthi has some resemblance to M. muscaria, differing 

 from it not only as M. muscarioides does, but in its denticulate lip and 

 more lanceolate form. But for its shorter spire it might be mistaken for 



