VALVATA. 19 



V. pisciNALia, Mliller. 



Spire manifestly raised above the last volution. 



Plate LXXI. % 9, 10. 



Nerita piscinalis, MtJLLKR, Hist. Verm. pt. 2, p. 172. 

 Helix „ Gmelin, Sj^st. Nat. p. 3627 (from last). 



Turbo fontitMlis, Pulteney, Hutchins, Hist. Dorset, p. 45. — MoNT. Test. Brit, 

 p. 348, pi. 22, f. 4. — Maton and Rack. Trans. Linn. Soc. 

 vol. viii. p. 1(38. — Dorset Catalog, p. 50, pi. 18, f. 3, 4. — 

 TuRT. Conch. Diction, p. 207. — Wood, Index Testaceolog. 

 pi. 31, f. 87. 

 Ci/dontoma ohtustun, Drap. Moll. Ter. et Fluv. France, p. 33, pi. 1, f. 14. 

 Vakutu ohtusa, Brard, Coq. Paris, p. 190, pi. (i, f. 17. — Turt. Manual L. and 

 F. W. Shells, p. 130, f. 114.— C. Pfeif. Deutsch. Lund und 

 Sussw. Moll. pt. 1, p. 198, pi. 4, f. 32, and pi. 1, f. 13 

 (animal). — Kickx, Moll. Brabant, p. 70. 

 Turbo thermalis, Dillw. Recent Shells, vol. ii. p. 852. 



Vaivata piscinalis. Lam. Anim. s. Vert. (ed. Desh.) vol. viii. p. 504. — Fleming, 

 Brit. Animals, p. 286. — Kenyon', Mag. Nat. Hist. vol. i. 

 p. 425, fig. b. c. d. — Alder, Mag. Zool. and Bot. vol. ii. 

 p. 117. — Gray, Manual L. and F. W. Shells, p. 97, 

 pi. 10, f. 114. — Thompson, Ann. Nat. Hist. vol. vi. p. 17. 

 — Brown, lllust. Conch. G. B. p. 27, pi. 14, f. 62 to 65. 

 — Blainv, Faune Franq. Moll. pi. 12, c. f. 6. — Sowerby, 

 Conch. Manual, f. 322. — Philippi, Moll. Sicil. vol. ii. 

 p. 122. — Menke, Zeitschrift Malak. 1845, p. 119.— 

 Gras, Moll. T. et Fl. France, p. 69, pi. 5, f. 17. 

 Valvee piscinate, Chenu, Traite Element, p. 470, f. 558. 



Of this common shell, there are two variations in form 

 among our native specimens, which ditler strikingly from 

 each other ; in the one, the shape is comparatively long, 

 and the umbilical cavity small in proportion ; in the other, 

 the shape is decidedly broad, the umbiUcus large, and 

 the edge of the aperture manifestly recedes anteriorly. 



The general contour is orbicular-trochoid, and the shell 

 is rather thin, a little glossy, somewhat transparent, and 

 of a pale horn-colour, changing upon the spire into a 

 reddish hue ; the entire exterior is densely wrought with 



