694 PLIOCENE MOLLUSCA. 



1878. Lunatia grcenlandica, G-. O. Savs, Moll. Reg. arct. Norv., pp. 158, 358, pi. xxi, fig. 15. 

 1886. Natica (Lunatia) gronlandica, Watson, Challenger Reports, vol. xv (Zoology;, p. 447. 

 1890—1915. Natica grcenlandica, A. Bell, Eep. Brit, Assoc. (Leeds), pp. 415.417, 1890 ; Geol. Mag. 



[6], vol. ii, p. 168, 1915. 

 1899. Natica (Lunatia) grcenlandica, Posselt, Medd. om Gronl., vol. xxiii, p. 139. 

 1901. Lunatia gronlandica and vars., Br^gger, Norges geol. TJnders0gelse, No. 31, p. 653, pi. ii, 



figs. 7, 8. 

 1901. Natica (Naticina) pallida, Kobelt, Icon, schalentrag. europ. Meeresconch., vol. ii, p. 96, pl.lv, 



figs. 19, 20 ; pi. lviii, figs. 23, 24. 

 1910 — 15. Lunatia groenlandica, Odhner, Arkiv for Zool., Stockholm, vol. vii, no. 4, pp. 7, 23, pi. i, 



figs. 36—39, 1910; L. pallida, K. Svensk. Vet.-Akad. Handl., vol. 1, p. 31, pi. iii, figs. 15, 19—37 ; 



pi. iv, figs. 1—8, 1913 ; vol. liv, p. 157, 1915. 

 1910. Lunatia grcenlandica, 0yen, K. Norske Vid. Selsk.'Skrift., no. 9, p. 75. 

 1912. Natica (Naticina) pallida, Dautzenberg et Fischer, Camp. Scient,, Prince de Monaco, vol. 



xxxvii (Mollusques), p. 234. 



Specific Characters. — Shell globose, fairly solid ; whorls 4 — 5, the last tumid, 

 much the largest, five-sixths the total length; spire small, short; apex minute, 

 but slightly prominent; suture nearly straight, narrowly excavated inwards; 

 mouth semicircular, expanded and obtusely angulate at the base ; outer lip some- 

 what incurved above ; inner lip thickened on the lower part, reflected upon the 

 columella and nearly covering the umbilicus, which is narrow and contracted. 



Dimensions. — L. 20 mm. B. 16 mm. 



Distribution. — Recent : Coasts of Yorkshire, Durham and Northumberland, 

 Dogger Bank, Shetland, Hebrides, Turbot-bank. West coast of Sweden, 

 Norwegian coast from the Christiania fiord to Finmark, Faroe islands, Lofoten 

 islands, Iceland, Jan Mayen, Greenland, Labrador, White Sea, Kola, Barent Sea, 

 Kara Sea, Nova Zembla, Siberian coast, Spitzbergen, Hudson's Bay, Nova Scotia, 

 Wellington Channel, North American coast, Banks of Newfoundland to Cape Cod, 

 Behring Sea, Sea of Okhotsk, Japan. 



Fossil : Waltonian Crag : Beaumont. Newbournian : Sutton. 

 Butleyan : Butley, Shottisham, Hollesley, Bawdsey. Icenian : Bramerton, 

 Thorpe (Suffolk), Chillesford, Weybourne. Wexford. Isle of Man. Iceland Crag 

 (Morch). 



Pleistocene: Kelsey Hill, Bridlington, Scotland, Ireland. 



Christiania fiord from Yoldia -c\a,ys to Tapes-hanks, Trondhjem, Uddevalla. 

 Montreal, Quebec, Riviere du Loup. Maine. 



Remarks. — This northern and arctic species, which has been generally known 

 as N. grcenlandica, is now identified by M. Dautzenberg and some other authorities 

 with the N. pallida of Broderip and Sowerby, although Messrs. Friele and Grieg 

 still consider these two distinct. 1 The form here described under the latter name 

 seems to have been a comparatively late arrival in the Crag basin, most of the 

 specimens known from our East Anglian deposits having been obtained from the 



1 Norske Nordh. Exped., pt. iii, p. 69, 1901. 



