114 HELICIDvE. 



BALEA, Prideaux. 



Shell spiral, produced, many-whorled, elongated, resem- 

 bling a Clausilia, but having no clausium ; mouth ovate 

 or sub-pyriform, plicated, usually with one imperfect 

 fold ; its margins unequal ; columella simple or plicated. 



Animal closely resembling that of BuUmus. 



The species of this genus are intermediate in aspect 

 between Pupte and Clcmsilifc. From the former they 

 differ in the unequal margins of the mouth. They are f^w 

 in number, and very dissimilar in aspect. 



B. FRAGiLis, Draparnaud. 



Plate CXXVIII. fig. 8, 9. 



Turbo perversm, Linn. Syst. Nat. ed. 12, p. 1240. — Penn. Brit. Zool. ed. 4. 

 vol. iv. p. 130, pi. 82, f. 116. — Mont. Test. Brit. p. 35.5, 

 pi. 11, f. 12; Suppl. p. 131. — Maton and Rack. Trans. Linn. 

 Soc. vol. viii. p. 181, pi. 5, f. 2. — Rack. Dorset Catalog, p. 51, 

 pi. 19, f. 11.— TuRT. Conch. Diction, p. 226. 

 BuUmiis „ PoiRET, Prodr. p. 57. 



Pupafragilis, Drap. Moll. Ter. et Fluv. France, p. 68, pi.. 4, f. 4. — C. Pfeif. 

 Deutsch. Land und Sussw. Moll. pt. 1, p. 56, pi. 3, f. 16. — 

 Lam. Anira. s. Vert. (ed. Desh.) vol. viii. p. 178. — Nills. 

 Moll. Sueciae Ter. et Fluv. p. 48. — Desh. Encycl. M6th. Vers, 

 vol. ii. p. 406. — MoKELET, Moll. Portugal, p. 74. 

 Clausilia parvula, Gart. Conch. Wett. p. 22. 



■>■> fragilis. Stud. Verz. Schweiz. Conch, p. 20. — Jeffreys, Trans. Linn. 

 Soc. vol. xvi. p. 351. — Hartm. Neue Alpina, vol. i. p. 215. 

 — Sturm, Deutsch. Fauna, sect. 6, pt. 7, pi. 1. — C. Pfeif. 

 Deutsch. L. and S. Moll. pt. 3, p. 62. 

 Odostomia perversa, Fleming, Encycl. Edin. vol. vii. pt. 1, p. 76. 

 Balca frayilis. Gray, Zool. Journ. vol. i. p. 61. — Sowerby, Conch. Manual, 

 f. 296. — RossMASSL. Iconog. Land und Siissw. Moll. pt. 10, 

 p. 24, f. 636. 

 „ perversa, Fleming, Brit. Anim. p. 271. — Macgiliv. p. 104. — Philippi, 

 Moll. Sicil. vol. ii. p. 220. — L. Pfeif. Monog. Helic. vol. ii. 

 p. 387. 

 „ frdfiilis. Alder, Trans. Nat. 11. Soc. Northumb. vol. i. — Turt. Manual L. 

 and F. W. Shells, p. 87, f. 70.— Brown, 111. Conch. G. B. p. 37. 



