Descriptions of two new species of Tasmanian fresh-water shells.

Detailed description of two new species, Ancylus irvinae n. sp. This wonderfully fine and interesting addition to our Mollucan fauna was obtained by Mr. R. Irvine, of Launceston, during an excursion to the Lake district. It was found attached to the rocks in the shallow margin of the lake, and although apparently numerous at the particular locality visited but only a very limited number of examples were collected. (Illustrative Plate) Gundlachia beddomei. n. sp. Habitat – pool off the Brown’s River Road. The specie is dedicated to its discoverer, Mr. C. E. Beddome, the well known conchologist of Hobart.