3] 2 PLIOCENE MOLLUSCA. 



I am figuring Dr. Odhner' s shell for comparison in connection with the next 

 paragraph. 



Our fossils are evidently waterworn ; all trace of the foldings on the columella 

 or of any spiral striation which may have formerly existed on them having been 

 obliterated. 



Genus VOLUTOMITRA, Gray, 1847. 



Volutomitra groenlandica (Moller). Plate XXXIII, figs. 5, 6. 



1842. Mitra groenlandica (Beck), Moller, Ind. Moll. Groenl., p. 15. 



1846-59. Mitra sp., E. Forbes, Mem. Geol. Surv., vol. i, p. 428, 1846 ; M. groenlandica, Nat. Hist. 



Europ. Seas, p. 262, 1859. 

 1851. ilitra groenlandica, S. P. Woodward, Mau. Moll., p. 356. 

 1853. Mitra groenlandica, Gray, Ann. Mag. Nat. Hist. [2], vol. xii, p. 129. 



1877. Volutomitra groenlandica, Morch in Eink, Dan. Greenl., p. 439. 



1878. Volutomitra groenlandica, G. O. Sars, Moll. Eeg. Arct. Norv., \>y. 244, 361, pi. xxiii, fig. 12. 

 1879-1915. Volutomitra groenlandica, A. Bell, List of Kocks and Foss. at Worden, p. 17, 1879 ; 



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

 1887. Volutomitra groenlandica, Fischer, Man. Conch., p. 610. 

 1899. Volutomitra groenlandica, Posselt, Medd. om Gr^nl, vol. xxiii, p. 171. 

 1901. Volutomitra groenlandica, Kobelt, Icon, schalentrag. europ. Meeiesconch., vol. ii, p. 4, pi. xxix 



figs. 3—7. 

 1901. Volutomitra groenlandica, Friele og Grieg., Norske Nordh. Exped. (Mollusca), pt. iii, p. 95. 

 1903. Volutomitra groenlandica, Lamplugh, Mem. Geol. Surv., Isle of Man, p. 475. 

 1910. Volutomitra groenlandica , Odhner, Archiv Zool., K. Svensk. Vet-Akad. Handl., vol. vii, no. 4, 



pp. 12, 24. 

 1916. Volutomitra groenlandica, Massy, Journ. of Conch., vol. xv, p. 48. 



Specific Characters. — Differs in form from Mitra comicula as stated above, it is 

 fairly solid, fusiform, and smooth, except that it is ornamented by excessively fine 

 spiral strias, invisible without the aid of a strongly magnifying lens and by incon- 

 spicuous lines of growth, the last whorl being about three-fourths the length of the 

 shell ; apex obtuse ; mouth equal in length to the spire ; inner lip forming a very 

 thin glaze on the columella which has 4 acute folds, the lowest less prominent 

 than the others. 



Dimensions. — L. 20 mm. B. 9 mm. 



Dirfributio)b. — Recent : west coast of Ireland, Norwegian coast, Finmark, 

 Iceland, Spitsbergen, Greenland. 



fossil; Isle of Man; Blackvvater, Co. Wexford ; Worden, near 

 Preston, Lancashire. 



Remarks. — I figure, with the recent shell received from Dr. Odhner alluded to 

 above, a small specimen from the Wexford gravels, possibly immature or dwarf, 

 which, except for its size, seems to correspond with it. 



