1863.] ON NEW AUSTRALIAN MARINE SHELLS. 425 



Alt. 1| inch, lat. 1 inch 10 lines. 



Hab. Hardwick Bay, Spencer's Gulf, South Australia (Coll. 

 Anffas.) . 



A pure-white gibbous species, very smooth towards the beaks, and 

 most nearly resembling D. japonica, but with the edges of the poste- 

 rior hinge-area rounded, and not angulate and lamellar. 



2. SuNETTA ALICIA, Ad. & Ang. (PI. XXXVII. fig. 18.) 



S. testa ovato-cordata, vix cequilaterali, latere postico latiore et 

 Totundato, antico angustiore ; albida, lineis roseis undulatis et 

 angulatis reticulata et pallide purpurascenti-rosaceo radiata, 

 intus carneola et pallide luteo tincta, margine intus crebre cre- 

 nulato. 

 Alt. 1 inch, lat. 13 lines. 



Hab. Encounter Bay, South Australia (Co/^ Angus!). 

 In some examples the colour is almost entirely purplish, and 

 painted with darker rays of the same colour. This lovely species is 

 named after the wife of one of the authors, who h<as rendered valuable 

 assistance to her husband in his conchological researches in the Au- 

 stralian continent. 



3. Naranio rtjbiginosa. Ad. & Ang. (PI. XXXVII. fig. 17.) 



N. testa transversim ovata, subobliqua, tenui, ventricosa, rubigi- 

 nosa, fusco-purpurascente obsolete radiata, ad latera et mar- 

 ginem ventralem pallida ; umbonibus parvis, acutis, incurvatis ; 

 superjicie vulvarum lineis elevatis divaricatis radiantibus con- 

 fertis corrugatis irregularibus tola insculpta; latere antico bre- 

 viore, rotundato ; margine postico declivi, ventrali regulariter 

 arcuato. 

 Alt. 8 lines, lat. 10 lines. 



Hab. Port Jackson, 4 fathoms, enclosed in a nodule of clay {Coll. 

 Angas.). 



An interesting addition to the limited genus Naranio of Gray, 

 having the characteristic divaricate sculpture of that group. It is a 

 thin delicate ventricose shell, of a reddish colour, faintly rayed with 

 brownish purple. 



4. HiATULA MONTROUZIERI, Ad. & Ang. 



H. testa transversim ovata, incequilaterali, utrinque hiante, latere 

 antico breviore vix producto, postico longiore stibrostrato, 

 jlexuoso, ad extremitatem rotundato ; superjicie valvarujn epi- 

 dermide olivacea induta, concentrice rugoso-plicata, porca ob- 

 tusa ab umbonibus ad marginem ventralem extendente ; margine 

 ventrali arcuato, postice subsinuato. 



Alt. 1 inch 3 lines, lat. 2 inches. 



Hab. New Caledonia {Coll. Angas.). 



We have much pleasure in naming this species in compliment to 

 M. Montrouzier, so well known for his investigations into the con- 

 chology of New Caledonia. 



