82 MALACOZOA. GASTEROPODA. PULMOBRANCHIATA. 



In the more coloured, regularly banded individuals, the ani- 

 mal has the neck, head, and tentacula black ; in those which 

 are paler, grey ; and in such as are of a nearly reddish-grey 

 colour, with a few markings, and without the band, the part 

 of the animal protruded is of a light yellowish-brown colour. 

 Similar variations are observed in other species, not of the 

 genus Helix only, but of other genera also ; so that the colour- 

 ing of the animal cannot with propriety be considered as of 

 much importance as indicative of specific distinction* 



As to the shell in this species, it presents numerous vari- 

 ations, both in form, and more especially in colour* The spire 

 is much more prominent in some individuals than in others ; 

 some are very thin, almost transparent, and of a nearly uniform 

 brownish-yellow colour, while others are variegated, with a 

 brown band, and some strongly marked, with the band black. 

 Their shells have the peristome less thick, but with a white 

 rib near the margin internally ; thick shells have no appearr 

 ance of an internal rib, but present a uniform thick peristome. 



" Juniores pellucidse, fuscse, vix lineis luteis notatse, at alia 

 nota noscuntur ; intra marginem aperturae acutum alter quasi 

 margo elevatus candidus, a prima setate observabilis ; testa 

 vero ad justam magnitudinem producta, hie secundus margo 

 evanescit, velin labium subreflexum album perditur." Muller. 



Generally dispersed in the lower districts. Common on 

 the grassy banks along the rocky coast of Kincardineshire, 

 on the banks of the Don near the bridges, and many other 

 places about Aberdeen. Extremely abundant among Iris 

 Pseudacorus, on the coast to the north of Stonehaven. Plenti- 

 ful also on the rocky coast of Buchan, from Colliston to Peter- 

 head ; and on the northern coast, as at Auchmedden and Banff. 



Helix arbustorum. Linn. Syst. Nat. i. 1045. Helix arbus- 

 torum. Muller, Verm. Terrestr. et Aquat, ii. 56, Helix arbus- 

 torum. Mont. Test. Brit. 413. Helix arbustorum. Penn. Brit. 

 Zool. iv. 136. PI. 85. f. 130. Helix arbustorum. Drap. 38. T. 5. f. 

 18. Helix arbustorum. Grey's Turt. 137. Helix arbustorum. 

 Flem. Brit, Anim. 264. Helix arbustorum. Lamk. Syst. vi. 2. 80. 

 Cochlea maculata, unica Fascia pulla, &c. List. Anim. Angl. 

 119. PI. 2. f. 4. 



3. Helix hortensis. Garden Snail. 



Shell subglobose, imperforate, of five convex whorls, finely 

 striated, yellow, with five longitudinal brown bands ; the 

 mouth sublimate, with the margin thick, somewhat reflexed, 

 white. Diameter ten-twelfths of an inch. 



