CLASSES, ORDERS, ETC. 75 



(c) Animal dark brown, slender, very glossy; mantle very 

 tumid behind, pale yellowish-brown ; sole ash-coloured ; slime 

 almost colourless. Shell unguiform, convex above, flat beneath, 

 solid ; margin not membranaceous. Length ^ to |ths inch. Very 

 active. In damp situations. Moderately common. L. Icevis. 



(d) Body rounded, compressed towards the tail, greenish-white, 

 slender; head and tentacles black; mantle yellowish; slime 

 thick, orange-coloured. Shell oval, somewhat tuberculous, margin 

 broad, thin, membranaceous. Length |ths inch. Woods in Shet- 

 land and Northumberland. Local. L. tenellus. 



(e) Body varies much in colour, banded ; mantle pointed 

 behind ; dorsal tentacles short ; foot margin white ; slime colour- 

 less. Shell oval, thin, nearly flat, margin broad and membranous. 

 Length i^ to 3 inches. In woods on trees, especially the beech 

 and walnut. Somewhat local. L. (Lehmannia) arborum.^ 



(/) Body large ; tentacles long, vinous-coloured ; mantle buckler- 

 shaped, swollen, produced behind ; slime whitish. Shell oblong, 

 solid, convex above, concave below, margin membranaceous. 

 Length, 3 to 6 inches. Cellars, gardens, woods, fields, hedgerows. 

 Common. L. maximus.^ 



(g) Mantle unicolorous ; pulmonary orifice margined with the 

 same colour as the ground colour of the body but of a deeper tint ; 

 keel different in colour from the rest of the body ; sole divided 



v. pttnctata, greyish- white, minutely spotted with black ; v. tristis, brownish, 

 mantle with two lateral brown bands, and sometimes a third intermediate band ; 

 v. cineracea, greyish-white, mantle ashy (type) ; v. submaculata, greyish-white, 

 streaked with seal-brown on the back which extends on to the posterior frds. 

 of the mantle, the sides of the body, and anterior Jrd of the mantle are free 

 from streaks and spotted with black. 



46 v. maculata, cinereous with the markings reduced to small and sharply 

 defined black spots of a rounded or elongated form, and with a continuous 

 band on each side showing a tendency to break into spots ; v. dicipiens, 

 brownish-grey, markings coalesced so as to produce the appearance of pale 

 spots on a dark grey ground, lateral bands on mantle ill-defined, no bands on 

 body, keel short, dorsal line partly obsolete. 



47 v. obscura, brown, unicolor ; v. maculata, ashy, mantle and back spotted 

 irregularly with black ; v. cinerea, ashy, spotless, mantle bluish-black ; v. 

 Johnstoni, ashy, mantle spotted with black, back marked with spots and two 

 bands of the same colour ; v. rufescens, reddish, unicolor ; v. fasciata, deep ash 

 colour with whitish bands, often five in number. 



