CH. Vll] SNAILS AND SLUGS 



L., 6", grey with black spots but varies much, tentacles 

 long, purple ; shell oblong, ^" x ". Var. cinereo-niger (Wolf), 

 4", respiratory aperture with margins darker than rest of 

 body ; sole of foot with white median band. 



genus Agriolimax (Morch.), agrestis (L.), animal 1 J" ; shield marked 

 with concentric lines, colour very various ; shell small, oblique. 



lewis (Miill.), |", dark violet brown ; shell square, minute ; respira- 

 tory aperture near centre of right margin of mantle. 



Family ARIONID^ Gray. Shield covering all the surface of the body. 

 genus Arion Fer., respiratory aperture half-way along shield, shell 



of loose calcareous grains, covered by hinder part of shield. 

 ater (L.), 4", shell of loose calcareous granules ; tentacles black. 

 fasciatus Nilsn., j", whitish-grey with lateral stripes. 

 hortensis Fer., J", shell granular, in an oval mass ; animal with 



grey stripes. 

 subfuscus (Drap.), J", shell of isolated calcareous granules ; animal 



reddish with two black stripes. 

 elongatus Collinge. 

 intermedius Normand, f ", light grey, tinged with yellow ; body 



glistening. 

 genus Geomalacus Allman, respiratory aperture near front edge of 



shield, shell unguiform, leathery, imbedded in shield. 

 mciculosus Allman, 2", black, spotted with yellow ; foot brown, 



sole light yellow, occurs only in S.W. Ireland ; probably 



introduced from Spain. 



Family TESTACELLID^E Gray. Animal terrestrial, slug-like ; shell 



rudimentary, ear-shaped and external, carried at the posterior 



end of body ; tentacles four, retractile, eyes at tip of upper 



pair. (Probably not truly indigenous, but now well established.) 



genus Testacella Cuvier. 



haliotidea Drap., shell ^" x i", ear-shaped, convex ; animal whitish 



or cream-coloured ; length 3^" 4". 

 scutulum Sby., shell " x ^" ; ear-shaped, flat or concave ; animal 



tawny yellow with brown spots, length about 3". 

 maugei Fer. ; shell f " x j", convex, semicylindrical ; animal narrow 

 in front, swollen behind, colour grayish-white to black -brown, 

 spotted ; length 2J" 3f ". 



