700 PLIOCENE MOLLUSCA. 



1840—70. Natica flava, Gould, Amer. Journ. Sci. [1], vol. xxxviii, p. 196, 1840; Iuv. Mass., ed. 1, 



p. 239, fig. 162, 1841 ; Bulbus flavus, ed. 2, p. 347, fig. 616, 1870. 

 1846. Natica Smithii, E. Forbes, Mem. Geol. Surv., vol. i, p. 429. 

 1850. Natica Smithii, S. V. Wood, Mon. Crag Moll, pt, ii, p. 321. 



1877. Acrybia flava, Morch and Poulsen, MS. List and Plates iu Geol. Mus. Copenhagen, No. 25, pi. i, 

 fig. 2 (unpublished). 



1878. Ampullina Smithii, G. O. Sars, Moll. Reg. arct. Norv., pp. 155, 358, pi. xii, fig. 2 ; pi. xxi. 

 fig. 18. J 



1901. Ampullina Smithii, Kobelt, Icon, schalentrag. europ. Meeresconch., vol. ii, p. Ill, pi. lvii, figs. 



12—14. 

 1915. Acrybia Smithii, Johnson, Boston Soc. Nat. Hist., Occ. papers, vol. vii, Fauna of N. England, 



No. 13, p. 107. 



Specific Characters. — Shell thin, semipellncid, oblique, ovato-globose ; whorls 4, 

 the last inflated, occupying nearly all the length ; spire minute ; suture slight ; 

 mouth very large, much expanded ; outer lip thin, irregularly rounded ; inner lip 

 excavated in the centre, very narrow ; columella tortuous. 



Dimensions. — L. 17 — 22 mm. B. 17 — 22 mm. 



Distribution. — Recent : Finmark, Lofoten Islands, Behring Sea, New England 

 coast. 



Fossil : Pleistocene : Ardincaple, Tayport. Iceland. 



Remarks. — My special thanks are due to Sir Aubrey Strahan, the Director of 

 the Geological Survey of Great Britain, for his courtesy in entrusting me with this 

 beautiful fossil, the one originally described by Smith having been accidentally 

 broken some years ago. The only other fossil locality I know of is that from the 

 Crag of Iceland, of which I have lately received a specimen from Herr Hans 

 Schlesch. 



Genus AMAUROPSIS, Morch, 1857. 

 Amauropsis islandica (Gmelin). Plate LVI, figs. 21 — 23. 



1790. Nerita islandica, Gmelin (Linnc), Syst. Nat., ed. xiii, vol. i, pt. 6, no. 3675. 



1835. Natica helicoides, Johnston, Proc. Berwick Nat. Hist. Club, vol. i, p. 69. 



1841 — 70. Natica caualicnlata, Gould, Rep. Inv. Mass., ed. 1, p. 235, fig. 161, 1841 ; Amauropsis 



helicoides, ed. 2, p. 348, fig. 617, 1870. 

 1842. Natica coronea, Moller, Ind. Moll. Groenl., p. 7. 

 1842—72. Natica helicoides, S. V. Wood, Ann. Mag. Nat. Hist. [1], vol. ix, p. 529, 1842 ; Mon. Crag 



Moll., pt. i, p. 145, pi. xvi, fig. 3, 1848 ; 1st Suppl., pt. i. p. 78, 1872. 

 1846. Natica helicoides, Loven, K. Svensk. Vet.-Akad. Forh., vol. iii, p. 89. 

 1850. Natica helicoides, Forbes and Hanley, Brit. Moll., vol. iii, p. 339, pi. c, fig. 6. 

 1867 — 72. Natica islandica, Jeffreys, Brit. Conch., vol. iv, p. 214, 1867 ; vol. v, p. 215, pi. lxxviii, 



fig. 1, 1869; in Prestwicli, Quart. Journ. Geol. Soc, vol. xxvii, p. 489, 1871; Aun. Mag. Nat. 



Hist, [4], vol. x, p. 244, 1872. 

 1872. Natica islandica, A. and R. Bell, Proc. Geol. Assoc, vol. ii, pp. 209, 213. 



