188 HELICID.E. 



" white- moutlis" [hortensis) -, and he offered to give odds 

 of ten to one in favour of the former. The variety Mjbrida 

 seems, however, to connect the two above-mentioned 

 forms, so far as concerns their conchological distinc- 

 tion ; and the only malacological character of importance, 

 upon which a difference between them can be founded, 

 consists in a slight variation of shape in their love-darts. 

 With great deference therefore to the opinion of those 

 who rank these forms as separate species, I cannot help 

 regarding H. nemoralis as the type, and H. hortensis and 

 H. hybrida as local or casual varieties of one and the 

 same species. I have never found any two of these forms 

 living together; and M. Bouchard- Chantereaux and 

 others have made the same remark. 



6. H. arbusto'rum^, Linne. 



H. arhustorum, Linn. Svst. Nat. ed. xii. p. 124.5 ; F. & H. iv. p. 48, pL cxv. 

 f. 5, 6. 



Body lustrous, dark grey or almost black above, and of a 

 light slate-Colour below, covered with round tubercles : mantU 

 marked with a few indistinct milk-white specks : tentacles 

 slender, much diverging, glossy and black ; bulbs very globular : 

 foot narrow and shghtly keeled at the tail, with the sides trans- 

 versely grooved. 



Shell globular, somewhat compressed below, usually rather 

 solid and nearly opaque, glossy, yellowish mottled with brown, 

 mostly having a single brown spiral band round the middle of 

 each whorl or a httle above it, closely but coarsely and irre- 

 g-ularly ridged in the line of growth, and very finely striate in 

 a spiral direction : epidermis rather thin : ivhorls 5-6, convex, 

 the last occuppng about three-fifths of the sheU : spire vary- 

 ing in length, but usually depressed and always endiug in 

 a blunt point : suture rather deep : mouth forming a segment 

 of two-thu'ds of a circle : outer lip thick, white and reflected, 

 sometimes strengthened by an internal, but not weU-defined 

 rib, much inflected above and rounded beneath : inner lip con- 



* Inhabiting copses. 



