120 HELICID&. 



field glasses, which enabled me at once to distinguish 

 between the different forms. 



Var. i. hortensis. Shell more globular, and usually smaller, 

 mouth and rib white, common. 



Var. 2. hybrida. Shell smaller, mouth and rib pink or brown, 

 more local. 



Var. 3. major. Shell much larger and more depressed. Sand- 

 hills and downs, Isle of Arran, Co. Galway, B.C. 



Var. 4. minor. Shell much smaller, otherwise like hortensis. 

 Zetland (Barlee), Loch Carron, Ross-shire (J. G. J.), B.C. 



Besides these varieties, monstrosities occasionally 

 occur ; in some cases the whorls are much produced, 

 or even separated, in others the spire is reversed. 



6. H. ARBUSTO'RUM,* LINN. PL. VII. 



Body very glossy, as if coated with moist varnish, bluish-black 

 or dark olive-green, thickly covered with coarse tubercles which 

 are oblong when the animal is extended and roundish when it is 

 at rest ; tentacles slender, upper pair considerably divided at 

 their base, gradually tapering, bulbs globular, tumid ; lower 

 tentacles very wide apart ; foot slaty-grey, its margins grooved, 

 ending in a rounded or bluntly pointed tail. 



Shell globose, somewhat compressed below, moderately solid, 

 glossy, scarcely semitransparent, yellowish-brown, dappled and 

 streaked with markings of a pale yellow or straw-colour and 

 usually having a dark brown band which encircles the centre of 

 the body whorl and the base of the upper volutions ; with strong 

 irregular ridges in the line of growth which are crossed by fine, 

 close-set, spiral striae ; epidermis thinnish ; whorls 5-6, convex, 

 body whorl occupying about two-thirds of the shell; spire 

 usually somewhat depressed, apex obtuse ; suture deepish ; 

 mouth forming about two-thirds of an oval; outer lip white, 

 thick, reflected, usually furnished with a slight internal rib of 

 the same colour ; inner lip thinly spread on the base of the 

 penultimate whorl ; umbilicus very small, oblique, nearly hidden 

 by the reflection of the outer lip. 



* Living in copses, 



