ARIONID^E. 105 



side of the foot marked with transverse black 

 lines; body with interrupted longitudinal grooves ; 

 shield minutely granular ; shell spongy, hemi- 

 spherical. 



Limaxater. Linn. Faun, Suec. 507. ; Mutter, Verm. 

 2.; Drap, 12'?. t. 9. f. 3—6.; Sturm, Faun.; 

 Nunneley, Trans. Phil. Soc. Leeds, 46 t. 1. £ 1. 1. 2. 

 £1. t.3. f. 1. 3—6. t.4, &5. f. 1. 



Limax rufus. Linn. F. Suec. 507. Razoum. — Drap* 

 123. t. 9. £6.; Sturm, Fauna, t. 



Limax succineus. Miiller, Verm, 7. 203. 



luteus. Razoum. 



marginellus. Schrank. 



Arion empiricorum. Ferus. Hist. Moll. 60. 17. t. 1, 

 2, 3. ; Alder, Mag. Zool. and Bot. ii. 1 05. 



Inhab. damp woods and hedges. 



They vary greatly in colour, from black to brown- 

 ish rufous, yellow, and yellowish white; the keel is 

 sometimes greenish ; the edge of the foot is generally 

 the same colour as the back ; but in some of the dark 

 varieties it is scarlet or yellowish : it is always lined 

 with black. Some naturalists have considered these 

 varieties as species ; hence the number of synonyma. 



Mr. Nunneley believes that the variation of co- 

 lour is " occasioned by habitation and food, as in fields 

 it is nearly always of a deep black, while in gardens, 

 where the food is more various, it is found of various 

 colours." This does not agree with my experience, for 

 I have found them of very various colours in woods, 

 and under exactly similar circumstances, and at the 

 same period. 



The calcareous particles, particularly of the red 

 variety, sometimes form an irregular sub-hemispheri- 

 f 5 



