104 THE LAXD AND F11E3HWATEE ilOLLUSCA OF DORSETSHIRE. 



Genus III.ZONITES, De Montfort, 



1. ZONITES CELLAIUUP, MuUtT, pi. 7. 

 HELIX LTJCIDA, Pult. cat., p. 47 ? 

 HELIX NITEXS, Rack, ed., p. 54, pi. 19, f. 22, in part. 



Body obtusely rounded before, and insensibly narrowing behind, 

 excepting at the neck, covered with very minute, flat, closely-set 

 tubercles, slate-colour above, with a yellowi-h tinge beneath. 



Shell compressed, slightly convex above and below with very fine 

 unequal longitudinal straj, very thin, brittle, transparent and glossy, 

 yellowish or brownish horn-colour above, whitish with often a 

 greenish tinge underneath ; whorls five to six, gradually increasing 

 in size, the last occupying about one-half of the shell ; spire nearly 

 flat ; umbilicus broad and deep, exuosing nearly all the interior of 

 the shell. L.0.2. B.0.5. 



Hab. In cellars, vaults, damp places in houses, under stones, 

 in drains and among grass. Generally distributed. 



9. Z. ALLIARIUS, Midler -, pi. 7. 



Body resembling that of the preceding ; but much darker, and the 

 tentacles shorter. 



Shell depressed, slightly convex above, flat beneath, marked with 

 very indistinct spiral and fine lines, thin, very glossy, transparent 

 horn-colour above, and not so white beneath as Z. cellarius; suture 

 moderately deep ; mouth narrow; outer lip sharp, slightly reflected 

 near t^ie pillar; umbilicus deep. 



Hab. Under stones, gardens, on uplands and sand-hills. 

 Generally distributed. 



Zonites alliarius is able to emit a strong smell of garlic, which 

 is more powerful when plunged in boiling water. 



3. z. NITIDULUS, braparnaud, pi. 7. 



Body dark-grey or slate-colour, with a brownish tinge. 



Shell compressed, sub-globular, convex abo^ e, more so than below 

 with fine spiral stria?, thin, moderately glossy, scarcely semi-transpar- 

 ent, brown or yellowish horn-culour above, whitish underneath, with a 

 bluish ting< j , especially about the umbilicus; whorls four to five, con- 

 vex, increasing very gradually, the la>t the largest, dilated towards 

 the mouth, which is round, except where it is interrupted by the 

 penultimate whorl ; umbilicus very deep and broad, exposing the 

 interior. L.0.15. B.0.33. 



Hab. In woods, under stones, among dead leaves and moss ; 

 Wilkes Wood, near Swanage (J.C.M.P.). 



