86 ADDITIONS TO THE TASMANIA* MARINE MOLLUSCA, 



Type, with 30 others, from. 40 fath., off Thouin Bay. 

 A most distinct form, that cannot be mistaken for any 

 other. 



PI. I., fig. 6. 



MARGINELLA SUBAURICULATA, Sp. Nov. 



Shell minute, smooth, greyish-white, very squat and 

 broad. Whorls about three, the spire minute, but dis- 

 tinct. Last whorl ventricose. Aperture rather narrow, 

 but expanding in front. Columella convex, with six 

 plaits, the basal one very strong and much curved, the 

 remaining five are small, decreasing as they ascend. Outer 

 lip massive, simple, rises above the summit of the shell, 

 curves widely outwards, but with sinuous inward curve 

 as it descends. 



Length 1.5. Breadth 1.2 mill. 



Type, from 40 fathoms, off Thouin Bay, with a few 

 others. A remarkably obese little species, that seems 

 thoroughly distinct from any other. 



PI. II., tig. 7. 



MARGINELLA THOUINENSIS, Sp. Nov. 



Shell small, white, semi-transparent, ovate, spire hidden. 

 Aperture narrow above, but widening considerably to- 

 wards the rounded front. Columella convex, bearing about 

 nine plications, of which the first three are strong. Those 

 above are very much smaller. Outer lip rises above the 

 summit, is strongly thickened, and simple. 



Length 2. Breadth 1.4 mill. 



Type, from 40 fathoms, off Thouin Bay, with about 

 thirty others. It forms one of a small group in company 

 with M. pumilio, Tate and May, and M. flindersi, Prit. 

 and Gat., of which pumilio is intermediate, and possibly 

 they are all variants of one species. 



PI. II., fig. 8. 



MARGINELLA FREYC1NETI, Sp. Nov. 



Shell very small, white and shining, ovate, narrower in 

 front, spire minute, but distinct, of about two turns. Aper- 

 ture rather narrow, widening gradually towards the front. 

 Columella slightly convex, and bearing three fairly equal 

 plications. The outer lip rises below the spire, and is 

 only slightly shouldered ; it is strongly thickened and 

 simple. 



Length 2. Breadth 1.2 mill. 



