666 PLIOCENE MOLLUSCA. 



1859. Lacuna pallidula, G. B. Sowerby, 111. Ind. Brit. Shells, pi. xii, fig. 81. 



1865 — 69. Lacuna pallidula, Jeffreys, Brit. Conch., vol. iii, p. 351, 1865 ; vol. v. p. 205, pi. lxiv, 



fig. 5. 

 1871—92. Lacuna pallidula, A. "Bell, Ann. Mag. Nat, Hist. [4], vol. viii, p. 49, 1871; Proc. Roy. 



Phys. Soc. Edin., vol. x, p. 296, 1890; vol. xii, p. 26, 1892 ; Rep. Yorlcs. Phil. Soc . p. 63, 1892. 



1877. Lacuna pallidula, Etheridge in J. Geikie, Gt. lee Age, ed. 2, p. 595. 



1878. Lacuna pallidula, G. O. Sars, Moll. Reg. arct. Norv., pp. 168, 358, 390, pi. xxi. tig. 21. 

 1892. Lacuna pallidula, Locard, Coq. mar. Cotes de France, p. 192, fig. 168. 



1901. Lacuna pallidula, Brogger, Norges geol. Unders^gelse, No. 31, pp. 405, 657. 

 1901. Lacuna pallidula, Conch. Soc. List, Journ. of Conch., vol. x, p. 17, no. 327. 



Specific Characters. — Shell rather thin, obliquely ovate; whorls 3 — 4, convex, 

 the last occupying nearly the whole length, much expanded ; spire minute, 

 excentric ; suture well defined; mouth very large and wide; outer lip thin, 

 rounded, incurved ; inner lip thickened, expanded below; columella canaliculate, 

 wide and deep. 



Dimensions. — L. (i mm. B. 5 mm. 



Distribution. — Recent: British coasts, Shetland to the Channel Islands. Irish 

 coasts. Norway — Christiania fiord to the Lofoten Islands. Iceland, Spitzbergen, 

 Greenland. Atlantic coasts of France. 



Fossil : Selsey, Portland, Dahnuir, Lochgilphead, Cumbrae, 

 Largo, Estuarine clays of Belfast, Portrush. 



Isocardia and Z'apes-banks, Christiania fiord. 



Remarks. — The specimen figured under this name is one of two obtained by 

 Mr. Bell at Selsey. It is a species found in several Pleistocene localities in 

 Great Britain and in Norway but is unknown from our Pliocene deposits. It is 

 closely allied to a North American form, the L. neritoidea of Gould, which Jeffreys 

 and Mr. C. W. Johnson considered to be a variety of L. pallidula. 



Lacuna puteolus (Turton). Plate LIII, fig. 26. 



1819—28. Turin, puteolus, Turton, Conch. Diet., \>. 198, figs. 90, 91, 1819; Lacuna puteolus, Zool. 



Journ., vol. iii, p. 191, 1828. 

 1853. Lacuna puteolus, Forbes and Hanley, Brit. Moll., vol. iii, p. 58, pi. lxxii, figs. 7 — 9; pi. lxxiv, 



fig. 9. 

 1865 — 83. Lacuna puteolus, Jeffreys, Brit. Conch., vol. iii, p. 348, 1865 ; vol. v, p. 205, pi. lxiv, 



fig. 4, 1869 ; Proc. Zool. Soc , p. 110, 1883. 

 1871—92. Lacuna puteolus, A. Bell, Ann. Mag. Nat. Hist. [4], vol. viii, p. 49, 1871; Proc, Roy. 



Phys. Soc. Edin., vol. x, p. 296, 1890; Rep. Yorks. Phil. Soc, no. 723, p. 63, 1892. 



1877. Lacuna puteolus, Etheridge in J. Geikie, Gt. Ice Age, ed. 2, p. 595. 



1878. Lacuna puteolus, G. O. Sars, Moll. Reg. arct, Norv., pp. 169, 358, 399. 

 1892. Lacuna puteolina, Locard, Coq. mar. Cotes de France, p. 192. 



Specific Characters. — Shell small, globular ; whorls -I — 4, convex, the last 

 three-fourths the total length ; suture rather deep ; spire very short with a 



