PETTERD : NEW TASMANIAN SHELLS. 1 43 



May be known from C. crocea Angas, by its 

 altogether different sculpture and want of colour. 



30. Volvaria lubrica n.sp. Shell minute, ovately cylindrical, 

 brownish, smooth, shining, translucent ; whorls 3, 

 rounded; aperture narrow, slightly increasing in width 

 towards anterior margin, where there is a single fold 

 forming its reflexed margin ; outer lip simple ; spire 

 scarcely elevated. Long. 2 mill., lat. i^mill. 



Habitat, Brown's River, dredged in about 6 

 fathoms. 



31. Marginella mixta asp. Shell small, elliptical, polished, 



. yellowish-brown ; whorls 4, spire but little elevated, 



apex obtuse ; aperture long and narrow, columella 



with three plaits, outer lip somewhat thickened. 



Long. 7 mill., lat. 3 mill. 



Habitat, Southern and Eastern coasts. 



Somewhat plentiful in accumulated shell sand. 

 Comes near M. stanilas Tenison Woods, but riiay 

 be separated by its narrow elongated form and tri- 

 plicate aperture. 



32. Marginella Beddomei n. sp. Shell small, ovate, 

 rather thick, shining, white ; spire rounded ; aperture 

 narrow, wider anteriorly, columella 3-plicate and 

 dentate above, outer lip thickened and thickly dentate. 

 Long. 3I mill., lat. 2 mill. 



Habitat, Southern coasts, with the preceding. 



A small ovate species, with dentate aperture, 

 It is not at all uncommon. 



33. Marginella Johnstoni n. sp. Shell thick, oblong, ovate, 

 pale yellowish-white, with a thick white callous ex- 

 pansion over the front, polished ; whorls 4^ ; spire 



