36 HELICTD.E. 



Z. NiTiDULUs, Draparnaud. 



Depressed, not highly polished, dull waxen yellow above, par- 

 tially opaque white beneath, smooth ; umbilicus decidedly 

 large. 



Plate CXX. fig. 8, 9, 10. 



Helix nitidula, Drapar. Moll. Terr, et Fluv. France, p. 117. — Gray, Medical 

 Repository, 1821, p. 239. — Jeffrevs, Trans. Linn. See. 

 vol. xvi. p. 340, not var. — Alder, Trans. Nat. Hist. Soc. 

 Northumb. vol. i- p. 38. — Brow.v, Illust. Conch. G. B. p. 52. 

 — Ferus. Prodrom. Moll. p. 213 (llelicella). — RossmAssl. 

 Iconog. Land und S'lissw. Moll. pt. 1, p. 72, f. 24 ; and pt. 8, 

 p. 26, f. 526. — Krynicki, Bull. Soc. Nat. Moscou, vol. ix. 

 p. 208. — Chemn. (ed. Klist.) Helix, No. 512, pi. 83, f. 20, 

 21, 22.— L. Pfeif. Monog. Helic. vol. i. p. 93. 



Oxj/cMitis nitiduhis, Fitzing. S3'st. Verz. Erzh. \Yeiclith. p. 100. 



Polita nilidukt. Held, Isis, 1837, p. 216. 



Helicella „ Beck, Index Moll. Mus. Christ. Frid. p. C. 



Zoniies nitidulus. Gray, Manual L. and F. W. Shells, p. 172, pi. 12, f. 136. — 

 Macgil. Moll. Abcrd. p. 89. 



Shell not very large, depressed, more convex above 

 than below, not lustrous but with a slight resinous gloss 

 of an uniform dull brownish amber or wax-colour above, 

 becoming paler below and changing into opaque white 

 underneath towards the mouth and umbilicus, obscurely sub- 

 striolated lengthways, otherwise smooth. Spire very little 

 raised, apex obtuse. Whorls four and a half to five, a 

 little rounded, rather broad, not abruptly enlarging; the 

 last rather wide but not depressed, rather bending down- 

 wards towards the aperture. Mouth obliquely crescent- 

 shaped, broader than high, not equal in width to half 

 the total diameter, very considerably projecting beyond 

 the penult whorl. Peristome thin, simple, not reflected. 

 Base not much rounded, concave centrally, umbilicus 

 rather large, profound. 



