helix. 83 



H. PYGMiiA, Draparnaucl. 



Resembling the last, but minute, paler, more transparent, more 

 depressed, composed of four turns at most ; the mouth less 

 circular. 



Plate CXXI. fig. 9, 10. 

 Helix pygmeea, Drap. Moll. Terr, et Fluv. France, p. 114, pi. 8, f. 8, 9, 10. — 

 Gray, Medical Repository, 1821, p. 239 (not described). — 

 Jeffreys, Trans. Linn. Soc. vol. xvi. p. 343. — Turt. Manual 

 L. and F. W. Shells, p. 61, f. 46.— Brown, Illust. Conch. G. 

 B. p. 51, pi. 18, f. 48*, 49.— Ferus. Prodr. Moll. no. 200; 

 Hist. Moll. Terr, et Fluv. pi. 80, f. 1 (Helicella).— Lam. (ed. 

 Desh.) vol. viii. p. 86. — C. Pfeif. Deutsch. Land und Siissw. 

 Moll. pt. 3, p. 21, pi. 4, f. 20, 21. — Charpent. N. Denks. 

 Schweiz. Ges. Nat. vol. i. (1837) p. 12 (Delomphalus). — 

 Rossmassl. Iconog. Land und S'usswas. Moll. pt. 8, p. 37, 

 f. 532. — Morelet, Moll. Ter. et Fluv. Portugal, p. 55. — 

 Chemn. (ed. Kust.) Conch. Cab. Helix, no. 564, pi. 89, f. 24 to 

 27. — L. Pfeif. Monog. Helic. vol. i. p. 97. 

 „ minuta, Studer in Coxe, Travels. 



„ A"*>6i7,SHEPPARD, Trans. Linn. Soc. vol. xiv. p. 163 (probably). — Jeffreys, 

 Trans. Linn. Soc. vol. xvi. p. 512. 

 Discus pygmceus, Fitzing. Syst. Verz. Erzh. Weichth. p. 99. 

 Patula pygmeea, Held, Isis, 1837, p. 916. 



Euryomphala pygmeea, Beck, Index Moll. Mus. Christ. Frid. p. 9. 

 Zonites pygmceus, Gray, Manual L. and F. W. Shells, p. 167, pi. 5, f. 46. — 

 Macgilliv. Moll. Aberd. p. 323. 



Shell very minute, convex, thin, of an uniform pale and 

 hardly transparent brownish horn-colour, with extremely 

 delicate, but regular, longitudinal strise, of a silky gloss ; 

 spire very short and small, the convexity being equal on 

 both sides of the shell ; apex blunt. Whorls three and a 

 half to four, moderately broad, not rapidly increasing, 

 deeply defined, convex. Aperture rather small, roundish, 

 crescent-shaped, about equal in width to two-fifths of the 

 total diameter, almost, if not quite, as high as it is broad. 

 Peristome thin, simple, not reflected. Base much rounded; 

 umbilicus large and profound. 



