14 PALUDINIDiE. 



13. 



TENT ACU LATA. 



Whorls only moderately convex ; axis imperforated, or having 

 at most a slight umbilical chink ; aperture not- projecting, 

 subpyriformly ovate, being contracted posteriorly. 



Plate LXXI. fig. 5, 6, and (Animal) Plate H. H. fig. 3. 



LiSTEK, Anim. Angl. pi. 2, f. 19; Conch, pi. 132, f. 32. 

 Helix tentaculaia, Linn. Syst Nat. ed. 12, p. 1249. — Pennant, Brit. Zool. ed. 4, 



vol. iv. p. 140, pi. 86, f. 140. — Pultenev, Ilutchins, Hist. 



Dorset, p. 49. — Donov. Brit. Shells, vol. iii. pi. 93. — Mont. 



Test. Brit. p. 389. — Maton and Rack. Trans. Linn. See. 

 vol. viii. p. 220. — Dorset Catalog, p. 56, pi. 21, f. 12.— 



TuRT. Conch. Diction, p. 68. — Dillw. Recent Shells, vol. i. 



p. 968.— Wood, Index Testaccolog. pi. 35, f. 176. 

 Nerita jaculaior, MiJLLER, Hist. Verm. pt. 2, p. 185. 

 Turho nucleus. Da Costa, Brit. Conch, p. 91, pi. 5, f. 12. 

 Cyclostoma impurum, Drap. Moll. Ter.et Fl. France, p. 36, pi. 1, f. 20. — Voith, 



in Sturm, Deutsch. Fauna, sect. vi. pt. 3, pi. 1. 

 Paludina impura, Brard, Coq. Paris, p. 183, pi. 7, f. 2. — TuRT. Manual L. 



and F. W. Shells, p. 134, f. 120.— Brown, Illust. Conch. 



G. B. p. 27, pi. 14, f. 72, 73. — Lam. Anim. s. Vert. (ed. 



Desh.) vol. viii. p. 514. — C. Pfeif. Deutsch. Land und 



Sussw. Moll. pt. 1, p. 104, pi. 1, f. 14; and pi. 4, f. 40, 41. 



— KiCKX, Moll. Brabant. Austral, p. 74. — Rossm. Iconog. 



Land und Sussw. Moll. pt. 1, p. 107, pi. 2, f. 65.— 



PiiiLipri, Moll. Sicil. vol. i. p. 148. — Sowerby, Conch. 



Manual, f. 537. — Gras, Moll. Ter. et Fluv. France, p. 67, 



pi. 5, f. 12. 

 Bithynia jaculator, Risso, H. N. Europe M^rid. vol. iv. p. 100. 

 Paludina tentaculatu, Fleming, Brit. Animals, p. 315 (not young).— Phii.ippi, 



Moll. Sicil, vol. ii. p. 122. 

 Bithinia tentaculaia. Gray, Manual L. and F. W. Shells, p. 93, pi. 10, f. 120.— 

 Macgilliv. Moll. Aberd. p. 124. 



This early known shell is thin, semi-transparent, quite 

 smooth, shining, and of a fulvous horn colour ; in shape 

 it ranges from ovate-acute to oblong-acute, but the latter 

 form is by far the less frequent. It is composed of five 

 volutions, of which the body- whorl, when viewed dorsally, 

 is equal to the rest collectively, and whilst they are only 

 moderately convex (and sometimes only slightly so), is 



