LIMAX. 21 



motion, the shield first smoothens, and then contracts into con- 

 centric stria-like wrinkles with the dilatation and contraction of 

 the body ; and the shell is more symmetrically developed. 



Limax agrestis has been transported to the United States, and 

 breeds abundantly in the vicinity of the principal maritime cities. 



4. Limax marginatus. Bordered Limax. 



Animal ; body gelatinous, moderately elongated, rounded on the 

 back, keeled towards the tail, livid grey, marked with pale ana- 

 stomosing wrinkles, striped with a loop of two distant longitu- 

 dinal bands ; shield oblong, rounded in front, widening and 

 then sloping to a point behind, finely concentrically striately 

 wrinkled, banded with a dark loop like the body ; respiratory 

 orifice small, posterior, arched over by the dark band. 



Shell ; oval, thin, sbghtly concave, silvery white. 



Limax marginatus, Miiller (1774), Verm. Hist. p. 10. (not of Draparnaud) . 



Limax hortensis, Ferussac (1822), pi. 8a. f. 4. 



Limax arborum, Bouchard- Chantereaux (1838), Cat. Moll. terr. etfluv. 

 Pas-de- Calais, p. 164. 



Limax salicetum, Bouillet (1836), Cat. Moll. terr. etjluv. Auvergne, p. 18. 



Limax glaucus and arboreus, Clarke (1843), Ann. and Mag. Nat. Hist. 

 vol. xii. p. 334. pi. 11. f. 4 to 10. 



Limax scandens, Normand (1852), Desc. Lim.p. 6. 



Limax (Etdimax) arborum, Moquin-Tandon (1855), Hist. Moll. terr. et 

 Jluv. vol. ii. p. 24. 



Hab. Central Europe, Britain (mostly on trees). 



The most obvious distinguishing characters of Limax marginatus 



