VITRINA. 143 



except the tentacles, which were drawn in, and feigned death; 

 that after the lapse of some hours it crept out of the water 

 cautiously and by degrees, and if it was not alarmed by the 

 observer it stretched out its horns, and after crawling into some 

 place of shelter withdrew its body into the shell." 



Y. BAUDONI, Delaunay. PL 30, figs. 17-19. 



Shell convex, subglobose, light greenish yellow, pellucid, 

 crystalline, very shining ; whorls 3j to 4, the apex mamillary 

 and not prominent ; aperture rounded. Diam. 4-5, alt. 2-3 mill. 



Near Cherbourg, France. 



Prefers the seashore ; appears after the autumn rains, and may 

 be seen climbing on stones covered with snow. The animal is 

 light violaceous, lighter on the sole, which is darker-margined. 

 The shell is more globose and elevated, whorls more numerous, 

 with a rounder aperture than V. pellucida. 



Y. GLOBOSA, Bottger. PL 30, figs. 20. 21. 



Brownish, more globose, with 2j rapidly increasing whorls, 

 the last one more dilated than in V. pellucida. 



Diam. 4, alt. 2'5 mill. 



Caucasia. 



Y. GRUNERI, Pfr. PL 30, figs. 22-24. 



Conoidally globose-depressed, very smooth, scarcely polished, 

 olivaceous-corneous ; suture white-margined ; whorls 3^, a little 

 flattened above, the last subdepressed, more convex below; 

 aperture somewhat oblique, Innately oval, lip simple, the extrem- 

 ities approaching, the colurnellar lip arcuate, snbinflected. 



Diam. 8, alt. 5 mill. 



Arabia. 

 Y. ANGELICA, Beck. PL 30, fig. 25. 



Convexly depressed, smooth, polished, pellucid, greenish 

 yellow ; spire small, subprominent, whorls 3^, rapidly increasing, 

 the last broad below, suture lightly wrinkled ; aperture oblique, 

 Innate oval, lip subinflected, the columellar margin not receding 

 and slightly arched. Diam. 6, alt. 3^ mill. 



Greenland, Labrador, Norway. 



Scarcely distinguished from V. pellucida by its aperture, and 

 more rapidly increasing whorls. 



