1863.] ON NEW AUSTRALIAN MARINE SHELLS. 423 



Long. 5 lines, lat. 11 line. 



Hab. Port Stephens, New South Wales, 5 fathoms (^Coll. Angas.). 

 A delicate semiopake-white slender species, with the aperture 

 peculiarly effuse anteriorly. 



8. RUMA RHODOCHEILA, Ad. & Aug. 



R. testa late ovata, rimata; spira parva, acuta; violascente tincta, 

 alba, epidermide tenui pallide straminea induta, transversim 

 tenuissime striata ; apertura ovata, putula ; labio rejlexo, urn,' 

 bilicum obtegente, rvfo-violascente tincto ; labro simplici, ar- 

 cuato, acuta. 



Long. 1 inch 7 lines, lat. 1 inch 3 lines. 



Hab. New Caledonia {Coll. Angas.). 



A pallid ovate species, with a patulous aperture, and with the 

 inner lip stained with reddish violet. 



9. Amauropsis moerchi, Ad. & Ang. 



A. testa ovata, spira elata, apice peracuto imperforato, epider- 

 mide olivacea obtecta ; anfractibus 7, convexiusculis, ad sutu- 

 ras obtuse angulatis ; apertura ovata; labio cullo tenui alba 

 induto, columella antice subrejlexa ; labro postice vix angu- 

 lato, margine acuto. 



Long. 5 lines, lat. 3 lines. 



Operculum tenue, corneum, subspirale. 



Hab. Watson's Bay, Port Jackson, under stones, low water {Coll. 

 Angas) . 



A dark brown Vivipara-like shell, with a very acute spire, and 

 ■with the whorls obtusely angulate at the sutures. 



IIL Gasteropoda rostrifera. 



It is our intention in a future paper to examine critically the Ros- 

 triferous Gasteropods of Australia ; meanwhile we have to describe 

 a new genus allied to Fossar, and an Adeorbis of larger size than 

 usual, and of great beauty. 



Genus Fossarina, Ad. & Ang. 



Testa turbinata, depressa, variegata, late umbilicata ; anfractibus 

 spiraliter costatis ; apertura circulari, magna, intus non mar- 

 garitacea ; labio arcuato, simplici. 



Operculum corneum, subspirale. 



This genus constitutes a pecuhar littoral form allied to Fossar, from 

 which it differs in the curvature of the inner lip and circular aper- 

 ture. It may be known from Conradia by its Stomatelliform cha- 

 racter, and from Jsapis in the inner lip not being furnished with a 

 tooth. In general appearance it reminds one of Fanicoro ; but the 

 shell is variegated, and the texture is entirely different. Fossar va- 

 riegatus, A. Ad., is a second species. 



