CLASSES, ORDERS, ETC. 75 



Shell oblong or quadrangular, thin, concave, margin mem- 

 branaceous. Length, 4 inches. Cellars and damp places. 

 Common. L.flavus^ 



(b] 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 fthsinch. Woods in Shet- 

 land and Northumberland. Local. Z. 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 ij to 3 inches. In woods on trees, especially the beech 

 and walnut. Somewhat local. Z. marginatus.^ 



(d) 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. Z. maximus.^ 



(e) 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 

 into three longitudinal bands, the middle one being white, the 

 two lateral ones dark. Length 3 to 6 inches. Gardens and 

 fields. Local. Z. cinereo-niger. 



1 8. Agriolimax. Like Limax, but differing anatomically in 

 having four instead of six turns in the intestine. 



(a) Animal varying in colour, generally creamy-white mottled 

 with dusky grey; mantle large, broadly rounded behind; foot 



44 v. viresccns, greenish, spots indistinct; v. grisca, ground-colour grey 

 instead of yellow, otherwise like the type ; v. suffnsa, grey, unicolor. 



45 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. 



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

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

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

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

 colour with whitish bands, often five in number. 



