138 Proceedings of the Royal Society of Victoria. 



Dimensions. — Length, 11 mm. ; breadth, 5 mm. 



Locality. — Port Fairy (Rev. T. Whan), Carrum Beach, Port 

 Phillip (Thos. Worcester). 



Observatiois. — Its nearest specific affinity in our waters is M. 

 ovulum, Sowerby ; but that species has four plaits, is shorter, and 

 not so cylindrical, and the aperture anteriorly is not so wide. 

 We have pleasure in naming it after the discoverer. 



Type in Mr. Gatliff's collection. 



DESCRIPTION OF PLATES XX. and XXI. 



Plate XX. 



Fig. 1. — Katica subcostata, T. Wds. 



,, 2. — The same. 



,, 3. — The same, operculum. 



,, 4. — Natica shorehami, n. sp. 



,, 5. — Erato denticulata, n. sp. 



Plate XXL 



Fig. 1. — Turbonilla (Ondina) micra, n. sp. 



„ 2. — Stylifer immaculata, n. sp. 



,, 3. — Odostomia metcalfei, n. sp. 



,, 4. — Turbonilla brevis, n. sp. 



,, 5. — Marginella whani, n. sp. 



,, 6. — The same. 



(Note. — All the figures are much enlarged). 



