?4 LAND AND FRESH-WATER SHELLS. 



more obsolete as the slug becomes adult, and represented then 

 by a pale line ; foot whitish. Length ii inches. Woods, gardens, 

 fields. Common. A. rircumscriptus. 



(e) Animal very light grey, tinged with lemon-yellow. Head 

 and tenacles dark grey, lateral bands ill-defined and often absent. 

 .Wrinkles on body when examined with a lens are seen to possess 

 characteristic pointed projections. Slime yellowish. Length when 

 extended i inch. Feeds on fungi. Not uncommon. A. minimus. 



15. Geomalacus. Shell solid, unguiform, concentrically 

 striated. Body capable of great extension ; mantle finely sha- 

 greened ; tentacles short, eyeless ; respiratory orifice placed more 

 anteriorly than in Limax ; tail provided with a large slime gland. 



(a) Animal black, spotted with yellow, coarsely tuberculated ; 

 foot brown, transversely furrowed ; sole light yellow divided into 

 three bands by a median longitudinal band. Length 2 inches. 

 West Kerry, Ireland. G. maculosus. 



1 6. Amalia. Shell oval or elliptical. Mantle granulated, 

 having the respiratory orifice on its posterior half; back keeled 

 from tail to mantle ; slime-gland absent. 



(a) Animal varying in colour ; mantle oblong, bilobed, rounded 

 behind, somewhat truncated anteriorly ; tentacles slate-coloured ; 

 slime colourless, glutinous. Shell oval, rugous, thick from 

 nucleus to centre. Length 2\ inches. Gardens and hedgerows. 

 Local. A. gagates.^ 



(b} Animal varying in colour, truncated in front ; mantle an 

 elongated oval, not bilobed ; head and tentacles dusky ; keel of a 

 lighter colour than the rest of the back ; slime colourless, glutinous. 

 Shell elliptical, somewhat concave, very thick. Length 2\ inches. 

 Gardens and fields. Common. A. sowerbyi.^ 



17. Limax. Shell oval, oblong, quadrangular, or unguiform. 

 Mantle concentrically striated ; respiratory orifice situated on pos- 

 terior half of mantle ; tail keeled, not the back ; slime gland absent. 



(a) Animal fleshy, yellow, tessellated with black and white, 

 coarsely tuberculated ; mantle broadly rounded behind ; head, 

 neck, and tentacles slate colour; sole milk-white; slime yellow. 



42 v. plumbens, lead-coloured ; v. rava, drab-coloured ; v. olivacea, olive- 

 coloured. 



45 v. rustica, greyish, mantle reddish, with a longitudinal black band on each 

 side ; v. ritfula, yellowish-red. 



