352 RissoiA. 



Section Plagiostyla, Fischer, 1872. 



R. AsTURiANA, Fischer. PI. 66, fig. 52. 



Smooth, translucicl, spire papiHary, imperforate, white ; whorls 

 4], subglobose, suture margined, last whorl obliquely ventricose ; 

 lip subthickeued, columella callous. Length, 2'5 mill. 



Asturia, Spain. 



Section Setia, H. and A. Adams. 1854. 



R. SEMiSTRiATA, Moutagu. PI. 69, fig. 21. 



Subsolid, scarcely pellucid, a little shining, whitish with two or 

 three spiral series of faint chestnut maculations, suture deep ; 

 whorls 5, convex, spirally striate, base rimate. Length, 2*3 mill. 



Europe. 



R. marmonita, Cantr., R. maculafa, Monts., R. suhsulcata, Phil., 

 R. tristriata, Thompson, R. pv.lchra, Johnson, and possibly R. granu- 

 lum, Phil., R. aemula, Granata, and R. Galvagni, Aradas, are syn- 

 onyms. 

 R. PULCHERRIMA, Jefl'reys. PI. 69, figs. 22, 26. 



Thin, smooth, striulate, subperforate ; whitish, with four spiral 

 series of chestnut maculations on the last Avhorl, sometimes more or 

 less confluent into strigations, apex obtuse, mamillary ; whorls 4, 

 very convex, with deep suture, last whorl expanding towards the 

 aperture, base rimate. Length, 2 mill. 



Europe. 



R. amabilis, Monts., is j^robably a synonym, and I think that R. 

 depicta, Weinkauff (fig. 26), not Manzoni, may also be placed here. 



R. PiCTA, Jeffreys. PI. 69, fig. 23. 



Somewhat solid, semipellucid, shining, spirally striated, yellowish 

 white, with spiral series of chestnut spots, apex obtuse, suture 

 moderate, subraargined ; whorls 5-6, compressed rounded, base im- 

 perforate. Length, 1*75 mill. 



Portugal, Canary Is., Madeira. 



Probably a variety of R. semistriata. 

 R. BENJAMINA, Mouts. PI. 69, fig. 24. 



Thin, transparent, yellowish, very slightly striate, with series of 

 chestnut maculations, apex obtuse ; whorls 5, slightly convex, with 

 distinct suture, base imperforate ; lip acute. Length, 2 mill. 



Mediterranean Sea, Portugal. 



It is R. concinna, Monts., not S. Wood, and probably a variety of 

 R. semistriata. 



