94 HELICIDJE. 



Var., shell pale horn-colour ; animal rather darker (Alder, 

 Cut. Mag. Zool and Bot. ii. 108.) : Helix nitidosa. Per. 

 Tab. Moll. 214. (not synonyraa) ; Rossm. Jan. i. 71. t. 1. f. 23. 



Inhab. under stones, decayed leaves, &c., in woods. 



Animal white, with two black lines; mantle white, 

 speckled with black. 



Shell varying from one fifth to one sixth of an 

 inch in diameter, somewhat like Z. crystallina, but 

 larger, more convex, and less shining, the whorls less 

 closely set, and the outer one larger in proportion to 

 the rest : the umbilicus is also larger. 



Mr. Jeffreys considers it as a variety of H. nitidula; 

 but Mr. Alder justly observes that it differs from 

 that species in being scarcely one third the size, of a 

 different colour, and without any trace of opacity 

 underneath. This species preserves its characters 

 unchanged even when living in the midst of its 

 allies. 



28. 4. ZONITES nitidulus. Dull Snail. Shell nearly 

 flat, deep yellowish horn-colour, sub-pellucid, 

 rather strongly wrinkled, of a dull waxy appear- 

 ance above, more shining below, except near 

 the umbilicus, around which it is of an opaque 

 white; whorls 4; umbilicus large, exposing 

 the second whorl, (t. 12. f. 136.) 



Oxychilus nitidulus. Fitz. Syst. 100. Polite nitidula. Held. 

 Isis, 1837, 216. Helicella nitidula. Beck, Intl. 6. Zonites 

 nitidulus. Gray, Man. 172. t. 12. f. 136. ; Forbes and Han- 

 ley, B. M. iv. 36. t. 120. f. 9, 10. Z. (Aplostoma) nitidulus. 

 Moq. Tand. Moll. Franc, ii. 83. t. 9. f. 12, 13. Helix niti- 

 dula. Drap. 117. t. 8. f. 21, 22.; Gray, Med. Jtepos. 1821, 

 239.; Shepp. Linn. Trans, xiv. 160.; Alder, Cat. 134.49.; 

 Mag. Zool. and Bot. ii. 147.; Jeffreys, Linn. Trans, xiii. 340. 



Var. 1. Helmii, t. 12. f. 136., transparent greenish white 





