118 HELICIDiE. 



is a favourite resort of numerous mollusks such as Limax 

 arborum, Helix lapicida, and other species, Balea and 

 Clausilia ; these do not seem tempted merely by the 

 smoothness of the beech, for they reject the sycamore and 

 ash growing in the same woods. Clausilia laminata is in 

 the main a south British form, though found in various 

 districts of both South and North of England, extending 

 from the Channel counties to Northumberland. In Ireland 

 it is rare and local, as at Cavan (T. W. Warren), and 

 Florence Court, in Enniskillen (W. Thompson). 



C. biplicata, Montagu. 



Greyish brown, ventricose, often with whitish streaks ; the 

 raised stria? neither crowded nor granular : mouth with only two 

 plaits. 



Plate CXXIX. fig. 4. 



Helix perversa, Muller, Verm. Ter. et Fluv. p. 118 ? 



Turbo LiplicaUis, Mont. Test. Brit. p. 3G1, pi. 11, f. 5. — Maton and Rack. 

 Trans. Linn. Soc. vol. viii. p. 179. — Turt. Conch. Diction, 

 p. 224 — Dili.w. Recent Shells, vol. ii. p. 874. 

 Clausilia plicata, Giirt. Wetteran Conch, p. 22. 



,-, „ var. b. Hartm. Neue Alpina, vol. i. p. 217. 



„ perversa, C. Pfeif. Dentsch. Land nnd Siissw. Moll. pt. 1, p. C3, pi. 3, 



f. 28. 



„ ventricosa, C. Pfeif. Deutsch. Land und Siissw. Moll. pt. 1, p. (53, pi. 3, 



f. 29. — Jeffreys, Trans. Linn. Soc. vol. xvi. p. 354. — 



Forst. Nov. Act. Leopol. vol. xix. pt. 2, p. 251. 



„ biplicata, C. Pfeif. Deutsch. Land und Siissw. Moll. pt. 1, p. 61, pi. 3, 



f. "27. — Fleming, Brit. Animals, p. 271- — Turt. Manual 



L. and F. W. Shells, p. 72, f. 55.— Gray, Manual L. and 



F. W. Shells, p. 214, pi. 5, f. 55. — Brown, 111. Conch. 



G. B. p. 38. — Forst. Nov. Act. Leopol. vol. xix. p. 277, 

 pi. 58, f. 8. — L. Pfeif. Monog. Ilelic. vol. ii. p. 469. 



Odostomia „ Fleming, Encycl. Edin. vol. vii. pt. 1, p. 77. 

 Clausilia similis, Montagui, Gray, Annals Philos. 1825, p. 413 (name only). 

 „ „ Ciiarpent. in Rossm. Iconog. pt. 1, p. 77, f. 30 ; pt. 7, p. 17, 



f. 168 ; pt. 1 1, p. 7, f. 705, 706. — Charpbnt. Cat. Moll. 

 Suisse, p. 17. — Roth, Moll. It. Orient, p. 20. — Rossmassl. 

 Iconog. pt. 7, p. 17, f. 469. 

 „ vivipara, Held, in Isis, 1837, p. 31.9. 



