326 RISSOIA. 



R. DECORATA, Phil. PL 62, figs. 30, 31. 



Rather solid, shining, scarcely pellucid, vitreous white, apex vio- 

 laceous, with longitudinal chestnut lines between the ribs, sometimes 

 tessellated with chestnut ; longitudinal ribs 12, thick, spiral striae 

 close, densely punctate ; aperture chestnut-violaceous, with a white 

 exterior varix. Length, 5 mill. 



Mediterranean Sea. 



The synonyms are R. pulchella, Danilo and Sandri, R. Lanzai, 

 Dunker, and var. lineolata, Brusina. 



R. FRAUENFELDIANA, Brusina. PL 66, fig. 37. 



Solid, turreted, with very convex, subangulated whorls and de6p 

 suture, with strong, rounded, elevated ribs, fading below the middle 

 of the body whorl, crossed by close strise ; lip varicose, produced ; 

 color vitreous white, peristome violaceous, varix white. 



Length, 5 mill. 



Dalmatia. 



More narrowly elongated, with more numerous whorls and more 

 elevated ribs than the preceding species. 



R. nodosa, Brusina, is a synonym. 



R. GUERINI, Recluz. PL 62, figs. 36, 34, 35. 



With about 10 thick, rounded, longitudinal ribs, and punctate 

 spiral striae, last whorl subinflated, usually smooth; lip varicose 

 externally; brownish, with close, zigzag, longitudinal chestnut 

 lines. Length, 5*8 mill. 



Europe. 



R. speciosa, Brusina, is a synonym. 



Var. COSTULATA, Alder. Figs. 34, 35. 



Narrower, yellowish, apex and aperture violaceous. 

 R. subeostulata, Schwartz, is a synonym. 



R. AUKANTIACA, Watson. PL 65, fig. 5. 



Subopaque, subgradate, with deep suture ; ribs 18-20, double the 

 width of the interstices, fading out towards the base, with a dozen 

 rounded spiral line, sometimes a little nodulous above ; lip thin, 

 thickened externally ; orange color, whitish towards the aperture. 



Length, 3 mill. 



Canary 'Is. 



R. MEKANOSTOMA, Requien, and var. AMPHORULA, Brugn. (un- 

 figured.) 



Mediterranean. 



