CLASSES, ORDERS, ETC. 73 



shagreened, not striated concentrically ; respiratory orifice placed 

 on anterior half of mantle ; tail provided with a slime gland. 



(a) Body varying in colour, coarsely tuberculated, rounded in 

 front, attenuated behind ; tentacles black, bulbs much swollen ; 

 margin of foot marked with transverse black lines ; slime yel- 

 lowish. Shell none, or consisting of loose granules. Length 2 

 to 5 inches. Type black. Woods, gardens, and hedge banks. 

 Common. A. ater.^ 



(b) Animal smaller than A. ater, marked with longitudinal grey 

 bands ; mantle with a bamd down its middle and one round its 

 margins ; margin of foot red, orange, or yellow ; slime yellowish. 

 Shell consisting of calcareous granules cemented into an oval 

 mass. Length i to i-| inches. Woods, hedges, gardens. 

 Common. A. hortensis.* 1 



(c) Animal cylindrical, reddish-brown, with two lateral faint 

 blackish bands ; mantle very convex, paler than back, with two 

 lateral black bands ; tentacles blackish ; back somewhat keeled 

 in its hinder portion and finely scaled ; pulmonary aperture nearly 

 median ; foot grey, marked with small transverse black lines ; 

 slime saffron-yellow. Shell a few loose granules. Length ij to 

 2\ inches. Woods and damp places. A. subfuscus. 



(d) Animal whitish-grey ; back blackish with lateral bands ; 

 keel well pronounced in young individuals, but becoming more and 

 more obsolete as the slug becomes adult, and represented then 

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

 fields. Common. A. Bourguignati. 



ir. Geomalacus. Shell solid, unguiform, concentrically 

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

 greened ; tentacles short, eyeless ; respiratory orifice placed more 

 anteriorily than in Lirnax; tail provided with a large slime 

 gland. 



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

 foot brown, transversely furrowed ; sole light yellow divided into 



40 v. rufa, red, unicolor ; v. brunnea^ coffee or rust coloured ; v. Draparnaudi, 

 dark-red, foot-fringe yellowish or reddish ; v. succinea, yellowish, unicolor ; 

 v. marginata, black, foot-fringe yellow, orange, or lead-coloured ; v. f 



dirty white. 



41 v t grisea, pale grey, uuicolor. 



