MALACOZOA. GASTEROPODA. PULMOBRANCHIATA. 83 



It varies in colour, being yellow, reddish, or whitish, some- 

 times without bands, sometimes with one, or any number up to 

 five ; the bands generally brown. When there is only one 

 band, it sometimes covers nearly the whole surface. 



Foot, when extended, oblong, rather pointed behind, margi- 

 nate, rugoso-granulate above, pale-grey ; neck compressed, 

 granulate, purplish-grey, with a medial narrow, and two lateral 

 broad pale bands; head darker, its fore part declinate and con- 

 vex; the upper tentacula long, subulate, clavate, granulate, 

 dusky-grey, with the tip pale-grey, the eye black ; lower tenta- 

 cula short, but semilunar. Another individual, of which the 

 shell is similarly banded, has the neck and tentacula a little 

 darker ; while another has the tentacula and their sheaths 

 grey, and the colours of the head, neck and foot much paler. 

 In general, the animal is of a pale-grey colour ; the head and 

 neck purplish-grey above, the neck with a medial whitish line ; 

 the hind part of the foot white, or yellowish-white. Some in- 

 dividuals are much darker than others, being all over of a 

 purplish-grey tint. 



"Helicem hortensem speciem a nemorali diversam suadent 

 parvitas (ilia enim adulta aetate hac semper minor) nitor testa? 

 splendidus, ac labium in majori, sive H. nem. constanter fus- 

 cum, in minori, sive H. hortensi album. His accedit, quod 

 varietates nemoralis cum variet, hortensis nunquam copula 

 jungi vitae sint, etiamsi in eas hoc respectu plures annos inqui- 

 siverim." Muller. Helix nemoralis, so abundant in the south 

 of Scotland, I have never met with in our district. 



Very common in pastures along the coast, especially among 

 the sand-hills, in the shelter of furze, and on the grassy 

 slopes of cliffs, as well as by walls and on banks in the interior; 

 but not in the highland tracts. 



A. Helix hortensis fasciata. Common banded variety. 



B. Helix hertensis unicolor. Similar, but not banded. 



C. Helix hortensis arenicola. 



Shell subglobose, very thin, diaphanous, hyaline, with five 

 opaque white bands ; the epidermis thin, pale sulphur-yellow ; 

 the peristome thin, with an internal opaque white rib. 



Animal pellucid, yellowish-white, diaphanous ; with the foot 

 oblong, rounded before, rather pointed behind, granulated on 

 the sides ; the neck and head granulated ; the upper tentacula 

 very long, subulate, with a small knob, the lower small, but 

 similar. 



