14 PALUDINlDiE. 



B. 



TENTACULATA. 



Whorls only moderately convex ; axis imperforated, or Laving 

 at most a slight umbilical chink ; aperture not projecting, 

 subpyriformly ovate, being contracted posteriorly, 



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



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

 Hclioe tentaculatu, Linn. Syst. Nat. ed. 12, p. 1249. — Pennant, Brit. Zool. ed. 4, 



vol. iv. p. 140, pi. 86, f. 140.— PuLTENEY, Hutchins, Hist. 



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



Test. Brit. p. 389. — Maton and Racic. Trans. Linn. Soc. 



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 Testaceolog. pi. 35, f. 176. 

 Nerita jaculator, Muller, Hist. Verm. pt. 2, p. 185. 

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

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



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

 PaltuUna impiira, Brard, Coq. Paris, p. 183, pi. 7, f. 2. — TuRX. 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 



Siissw. MoU. pt. 1, p. 104, pi. 1, f. 14; and pi. 4, f, 40, 41. 



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



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



Philippi, Moll. Sicil. vol. i. p. 148. — Sowerbv, Conch. 



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



pi. 5, f. 12. 

 Bit/ii/majaculator,'Risso, H. N. Europe Merid. vol. iv. p. 100. 

 Faludljia tcfitaculuta, Fleming, Brit. Animals, p. 315 (not young). — Philippi, 



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

 Bitliiniu 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 hoiii 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 sometimeis only slightly so), is 



