HELIX. 75 



ceous prickles. Volutions four, rather broad, not rapidly 

 increasing, ventricose, much elevated, deeply separated. 

 Spire raised. Aperture rounded, of nearly equal width 

 and height, about equal to half the basal diameter, produced 

 below beyond the general level of the base. Peristome 

 very thin and acute (an internal rib in aged individuals 

 only), slightly expanded, only reflected at the columella. 

 Base rounded; with a moderately large and deep umbi- 

 licus. Diameter about the tenth of an inch. 



The animal is bluish or greenish grey, darkest on head 

 and neck. 



Of all our minute species this is the most singular and 

 beautiful. It lives among moss in woods, and is widely 

 distributed through the British isles. 



H. fulva, Miiller. 



Trochiform, minute, smooth, almost imperforated. 

 Plate CXVIII. fig. 809. 



Helix fulva, Muller, Hist. Verm. pt. 2, p. 56. ? — Turt. Manual L.and F. W. 

 Shells, p. 61, f. 47.— Gray, Manual L. and F. W. Shells, p. 148, 

 pi. 5, f. 47.— Brown, Illust. Conch. G. B. p. 46, pi. 17, f. 2.— 

 Drap. Moll. Ter. et Fluv. France, p. 81, pi. 7, f. 12, 13.— C. 

 Pfeif. Deutsch. Land, und Siissw. Moll. pt. 1, p. 23, pi. 2, f. 2. — 

 Lam (ed. Desh.) vol. viii. p. 78. — Krynicki, Bull. Soc. Nat. 

 Moscou, vol. ix. p. 167. — Rossmassl. Iconog. and Siissw. Moll, 

 pt. 8, p. 38, f. 535. — Dupuy, Moll, du Gers, p. 15. — Morelet, 

 Moll. Ter. et Fluv. Portugal, p. 72. — Chemn. (ed. Kiist.) Conch. 

 Cab. Helix, no. 212, pi. 30, f. 22, 23, 24.— L. Pfeif. Monog. 

 Helic. vol. i. p. 30. 

 Trochus terrestris Listeri or var. a, Da Costa, Brit. Conch, p. 35, probably. 

 Helix trockiformis, Mont. Test. Brit. p. 427, pi. 11, f. 9. — Turt. Conch. 

 Diction, p. 54. — Maton and Rack, Trans. Linn. Soc. 

 vol. viii. p. 200. — Jeffrevs, Trans. Linn. Soc. vol. xvi. 

 p. 331, 507. 

 „ nitidula, Alten, Erd u. Flusskonch. Augsburg, p. 53, pi. 4, f. 8. 

 „ trochulus, Dillw. Recent Shells, vol. ii. p. 916. — Macgilliv. MolL 

 Aberd. p. 85. 



