ZONITES. 107 



about 7000 feet above the sea-level, and afterwards 

 compared them with the types in Charpentier's col- 

 lection Instead, therefore, of the present 



species being exclusively British, it likewise appears 

 to inhabit Lapland, Finland, Germany, and Switzer- 

 land." 



Var. vitrina. Shell greenish-white, transparent. Helix 

 vitrina, F^r., ' Tabl. Syst.,' p. 45 ; H. viridula, Menke, * Syn. 

 Moll.,' p. 20. South Wales, Cork, and Connemara, B.C. War- 

 wickshire (W. G. Blatch), near Huddersfield (J. Whitwham), J.C. 



9. Z. CRYSTAL'LINUS,* MULLER. PL. VII. 



Body milk-white, almost transparent ; tentacles shortish, 

 upper pair inky-black, lower pair greyish ; foot whitish, narrow, 

 ending in a point behind. 



Shell depressed above, slightly convex underneath, thin, ex- 

 tremely glossy, translucent and iridescent, white with a greenish 

 tinge, with very fine, close-set, transverse striae, which are 

 stronger near the suture ; epidermis exceedingly thin ; whorls 

 4| 5, gradually increasing, somewhat convex, but outwardly 

 compressed ; spire very slightly produced ; suture distinct but 

 shallow ; mouth semilunar, sometimes furnished with a slight 

 internal rib ; outer lip very thin, oblique ; umbilicus distinct but 

 narrow and not deep. 



Inhabits woods, damp meadows, and shady places, 

 among moss and decayed leaves, as well as under 

 stones and fallen branches of trees in most parts of 

 Great Britain. 



Var. complanata. Shell nearly flat on both sides, the last 

 whorl proportionally larger than the others. Leigh Woods, 

 near Bristol (J. G. J.), B.C., vol. i. p. 170. 



* Resembling crystal. 



