RISBOIA, 



iie.n PLAGIOSTYI.A. Fisher. 



M MAWA, Fischer. Pi. '<;. fig, 



Smooth, translueiil. spire papillary, imperi'orate, white; whorls 

 ih-loho-e. Mitnre margined. l:>t whorl obliquely veiitricose; 

 lip subthickened. colnmella callous. Length. -'~> mill. 



A *f u fin. Sjmui. 



Section SKTIA, H. and A. Adam-. 1 



II. -IMKPRIATA, Montagu. PI. 69, fig. 21. 



Subfeolid, scarcely pellucid, a little shining, whitish \\ith two or 

 thi-cc -piral srrirs it' i'aint chestnut inaculations, suture i 

 whorls .">, convex, spirally striate. lase riniate. Length. '2'-\ mill. 



Europe. 



R. iii'iriiini'tifii, ( 'antr., R. maculata, Monts., R. subsulcata, Phil.. 

 /,'. trittri'ifti, Thompson, R. pulchra, Johnson, and possihly /.'. r/ranu- 

 /iiin, Phil.. /'. aemula, (iranata, and R. Galvagni, Aradas, are syn- 

 onyms. 

 K. ITI.C HKKKIMA, Jeffreys. PL 60, figs. 22, 26. 



Thin, smooth, stimulate, suh perforate ; whiti>li, with four spiral 

 Beriefl ot'chcMnut maculations on the last whorl, sometimes more or 

 li->s cmillui-nt into stri Cations, a]>ex 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 probably a synonym, and I think that R. 

 dej)icta, Weinkanflf (fig. 26), not Manzoni, may also be placed here. 



I;. riCTA, Jeflivy.-. 1M. ;:. fi.-. '2'.\. 



Somewhat solid. Bemipellucid, shining, spirally striated, yellowish 

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

 moderate. -iil>mar;_rined ; whorls .")-(). compressed rounded, base im- 

 periorate. L. n-ih, 1'7") mill. 



Portugal, Canary Is., Madeira. 

 Probably a variety of R. semistriata. 

 \(. I'.I.N.I VMIN \. Mont-. PI. (i!, fiir. LM. 



Thin, transparent, \cllo\\ i-h. very sliirhtly striate, with series of 

 :nnt macnlation-. ap-x olitn-e; whorls ~), slightly envex. with 

 di-tinet .-ntnre. ba-e impert'-M-atc ; lip acute. Length. '2 mill. 



Mc<lit' //'/ n can Sea, Poriugnl. 



It i- A*. OOMJlina, M"iit-.. not S. \V 1. and probably a variety of 



R. semiftri'it" . 



