CLASSES, ORDERS, ET. ?3 



14. Arion. Shell consisting of calcareous granules. Mantle 

 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. aterJ 



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

 bands j mantle with a band down its middle and one round its 



Fig. 29. A rion ater. 



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**- 



(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 i|- to 

 2\ inches. W T oods and damp places. A. subfuscus. 



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

 keel well pronounced in young individuals, but becoming more and 



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.pallescens, 

 dirty white. 



41 v. grisea, pale grey, unicolor. 



