226 PYRAMIDELLID^. 



speculated on the possible parasitic nature of the latter 

 genus. The habits and structure of Eidima are, however, 

 sufficiently distinct. 



S. TuRTONi, Broderip. 



Plate XC. fig. 8, .0, and (Animal) Plate 0. fig. .5. 



Phasiafiella sii/Kfera, TvRTO^ in Zool. Journ. vol. ii. p. 3()7, pi- 13, t'. U. — 

 Brit. IMaiine Conch, p. 18G. — Brown, 111. Conch. G. B. 

 p. 10. 

 Velutina „ Fleming, Brit. Anim. p. 326. 



Stylifer 7Mr<o«2, Broderip, Zool. Proc. 1832, pt. 2, p. fil ; Penny Cyclo]). 

 vol. xxiii. p. 179. — Alder, Moll. Northumb. and Durli. p. 4.5, 

 animal. 

 „ globos'is, Johnston, Proc. Berw. Club, vol. i. p. 275. 

 „ stylifera, Brit. jMarine Conch, p. XLTV. 

 „ asUriiola, Brown, 111. Conch. G. B. p. 133, pi. 10, f. 40, 41. 



This, the only species of its genus, that has yet been 

 found in the European seas, is a small nearly globular 

 perfectly smooth transparent glossy and very thin shell, 

 rarely exceeding a little more than one- tenth of an inch 

 in length, and a slightly less diameter across the body- 

 whorl. It is of pale yellowish horn-colour, and occa- 

 sionally has a tinge of rufous towards the pillar-lip. 

 There are about five volutions ; that forming the body- 

 whorl is very ventricose, and large in proportion to the 

 others, constituting the great bulk of the shell ; the second 

 is comparatively small, and varies in dimensions in dif- 

 ferent specimens ; the third is very much less, and is also 

 variable, generally it is not longer than the terminal vo- 

 lutions, and witli them forms a curious styliform process 

 constituting the apex of the shell. The apical whorl 

 is sometimes set obliquely but is not reversed. The suture 

 dividing the whorls is strongly marked. The aperture 

 is rounded ovate and entire ; it occupies two-thirds of 



