MALAC0Z0A. GASTEROPODA. PULMOBRANCHIATA. 89 



wrinkles ; generally pale yellowish-brown or yellowish-grey or 

 horn-colour, sometimes variegated with a lighter tint ; the 

 whorls well defined, the last rounded ; the mouth oblique, semi- 

 lunate; the lower surface generally paler, and more or less 

 tinged with a somewhat opaque milky or opaline white. In 

 very dry situations, the shell is thicker, often firm, somewhat 

 opaque and of a pale horn-colour ; in moist situations, often very 

 thin, fragile, and yellowish -brown, always however paler than 

 Zonites nitidulus. When long dead, it becomes opaque white. 



The animal is of a pale grey or greyish-white colour, with 

 the tentacula purplish-grey or dull lilac, the upper marked 

 with a dusky shade ; the eyes blackish ; the foot extremely 

 thin, linear beneath, and pointed behind. 



Common in damp shady places, by walls and hedges, 

 and among stones, chiefly near the sea-coast. I have not found 

 it far in the interior. Very abimdant below stones, among 

 grass and nettles, and in the buildings, among the ruins of 

 Dunottar Castle. Plentiful about Old Aberdeen ; at Delgaty, 

 and Banff, where it was found by Miss Macgillivray. 



Helix cellaria- Muller, Verm. Terrestr. et Aquat. ii. 28. — 

 Helix luckLa. Mont. Test. Brit. 425. PL 23. f. 4.— Helix nitida. 

 Drap. MolL 117. PL 8. f. 23, 24, 25.— Helix cellaria. Laruk. 

 Syst. Ed. 2. Tiii. 71. — Zonites cellarius. Gray's Turton, 170. 

 — Helix nitida. Flem. Brit. Anim. 262. 



3. Zonites nitidulus. Nitidulous Zone-Snail. 



Shell depressed, considerably convex above, somewhat 

 wrinkled, transparent, glossy, light yellowish-brown, of five 

 whorls, which are direct and slightly convex at the suture- 

 margin, and of which the last has a small part of the under 

 side along its inner margin whitish and very slightly opaque; 

 the umbilicus rather large and deep ; the aperture oblique, 

 subelliptical, longer than broad, Diameter four-twelfths of 

 an inch, height nearly ten-twelfths. 



This species is so nearly allied to Zonites lucidus that a not 

 very careful collector might readily confound them. It is 

 smaller than Zonites cellarius, of a richer colour, generally yel- 

 lowish-brown, with a kind of waxy appearance in light reflected 

 from its interior, of a duller external gloss, higher in proportion 

 to its breadth, and with the whorls not bent at the suture- 

 margin, so as to form a flattened or concave space. There is 

 comparatively very little opacity or whiteness on the lower 

 surface, and only along the inner part of the whorl ; the um- 

 bilicus is a little larger, and the mouth less obliquely placed. 



H 2 



