RISSOIA. 365 



Unfigured Species of Alvania. 



R. CARPENTERI, Weink. Vancouver's Isl. 



Is R. reticulata, Carp, (not Montagu). 



E. FILOSA, Carp. Vancouver's Isl. 



R. PURPUREA, Dall. Monterey, Cal. 



R. PERLATA, Morch. West Coast Central America. 



R. AEMULA, Monts. Messina, Sicily. 



R. MARIONS, Monts. Toulon, France. 



R. BADIA, R. CIRCINNATA, R. CLATHRATULA, R. CONCINNA, R. 

 FERRUGINEA, R. MARIELLA, R. SCITULA, R. SEMICOSTATA, R. 



TIARULA, all of A. Adams. Japan. 



R. FASCIATA, Tenison Woods. Tasmania. 



R. FUSCA, R. FENESTRATA, R. GUADRATA, Gould. China Sea. 



R. ACUMINATA, Gould. Bonin Is. 



R. PURA, Gould. Simoda, Japan. 



R. BAYNTONI, Beddome. Tasmania. 



Section ACINOPSIS, Monts. 1884. 



R. CRENULATA, Mich. PI. 65, fig. 14. 



Irnperforate, solid, opaque, yellowish white, tinted and indistinctly 

 bifasciate with chestnut, spire mucronate; longitudinally broadly 

 ribbed, strongly spirally lirate, the intersections forming strong 

 rounded tubercles; whorls 6-7, convex, the suture widely channeled; 

 aperture expanded, brownish red and sulcate within, subcanaliculate 

 below, lip crenulately varicose exteriorly, columella tuberculated 

 anteriorly. Length, 5 mill. 



Europe. 



It is R. cimex, Donovan, R. cancellata (Da Costa ?) Jeffreys, and 

 R. verrucosa, Risso. 



R. HIRTA, Monts. Unfigured. Mediterranean Sea. 



Section MASSOTIA, Bucq. Dautz. Dollf. 1884. 



R. LACTEA, Mich. PI. 66, fig. 51. 



Thin, subtranslucid to opaque, feebly longitudinally and spirally 

 closely costellate, yellowish white or white ; whorls 5-6, subconvex, 

 With linear suture, lip scarcely thickened externally. 



Length, 6 mill. 



Mediterranean Sea, Portugal. 



R. cancellata, Petit is a synonym. 



