40 HELlCIDiE. 



Iconog. Land und SUsswas. Moll, pt, 1, p. 72, pi. 1, f. 2").— 

 Krynicki, Bull. Soc. Nat. Moscoii, vol. ix. p. 207. — Char- 

 pent. N. Denks. Schweiz Gcs. Nat. vol. i. (1837) p. 13. 



« Helix tenuis, Dillw. Recent Shells, vol. ii. p. 913. 

 „ succitwa, Studer, in Coxe Trav. (Hartm.) 



Oxychilus lucidus, Fitzing. Syst. Verz. Erzh. Weichth. p. 100. 



Tcmychlamys liicida, Benson, Proc. Zool. Soc. 1834, p. 89. 



PoUta „ Held, Isis, 1837, p. 916. 



Helicella nitida and succinea ? Beck, Index Moll. Mus. Christ. Frid. p. 6. 



Zo7iiies lucidus, Gray, Manual L. and F. W. Shells, p. 174, pi. 4, f. 38. — 

 Macgil. Moll. Aberd. p. 90. 



Shell vather small, rather depressed, thin, transparent, 

 glossy, of an uniform brownish fulvous hue, not exhibiting 

 any trace of opacity on the lower disk, longitudinally 

 striolate, spire a little raised, rather obtuse at the apex. 

 Whorls four and a half or five, gradually and not abruptly 

 enlarging, moderately convex, well defined ; the last broadly 

 rounded and not contracted at the circumference. Aper- 

 ture roundish crescent-shaped, rather broader than high, 

 not quite equal to half the total diameter. Peristome 

 thin, simple, not reflected, basal edge arcuated, base some- 

 what rounded, a little produced anteriorly, umbilicus 

 decidedly large, displaying the second volution, diameter 

 rather above a quarter of an inch. 



The animal is dark. This snail is not uncommon under 

 stones in shady places. 



Z. ExcAVATUs, Bean. 



Small, transparent and fulvous above and below, much shin- 

 ing, regularly striated ; whorls very slowly enlarging, so that 

 the body is scarcely broader than the preceding turn ; umbi- 

 licus peculiarly capacious. 



Plate CXXI. fig. 2, 3, 4. 



Helix excavata, Bean, in Alder's Catalog. L. and F. W. Shells (Trans. Nat. 

 Hist. Soc. Northunib. vol. i. p. 38). — Alder, Mag. Zool. 

 and Bot. vol. ii. p. 107. — Thompson, Ann. Nat. Hist. vol. vi. 



