616 PLIOCENE MOLLUSCA. 



Jeffreys from Guernsey to Unst, has been reported as a fossil from the Coralline 

 Crag of Sutton, from Walton-on-Naze, from the Pleistocene deposits of Selsey and 

 elsewhere, and from Portrush. The Sutton specimen here figured agrees in form 

 with the type shell, but Avas unfortunately broken l)y accident while in the artist's 

 custody and does not show very clearly the longitudinal sculpture ; there is another, 

 however, in the York Museum from Portrush in which both it and the transverse 

 markino's are distinctlv exhibited. 



Zi. puncfMva has been obtained by A. Bell from the Pliocene deposits of Biot, 

 and is reported by Seguenza from various Pleistocene localities in Sicily and 

 Calabria, by Malm from Uddevalla and from the Tapes-hunks, of the Ohristiania 

 fiord by Prof. Br^gger. As a recent shell it ranges from Finmark to the Canaries. 



Alvania multistriata (A. Bell). Plate LI, fig. 33. 



1892. Eissoa mnltistriata, A. Bell, Eep. Yorks. Phil. Soc, pp. 62, 67, 76, pi. i, fig. 26. 



Specific CJtaracters. — Shell minute, conical, rapidly tapering; whorls 5, convex, 

 the last more than half the total length ; ornamented by well-marked, closely set 

 spiral ridges, and the lower whorls and the upper part of the last by rather swollen 

 ribs which do not extend far below the suture ; mouth oval ; outer and inner 

 lips thin ; umbilicus minute but deep. 



Dimensions. — L. 3 mm, B. P5 mm. 



Distribution. — Not recorded living. 

 Fossil : Selsey. 



Remarks. — This beautiful fossil, to which the artist has hardly done credit, is 

 another unique form obtained by Mr. A. Bell during his long-continued investi- 

 gation of the Selsey bed, a work extending over a period of nearly twenty years, 

 and resulting in the discovery of an unexpectedly rich, distinct and interesting 

 molluscan fauna of more than 200 species, some of them new to science, which, 

 although of Pleistocene age, seem to bo of a comparatively southern type. A 

 detailed list of the mollusca of the Selsey deposit was published by him on page 62 

 of the Report of the Yorkshire Philosophical Society for 1892. The Selsey fauna 

 appears to differ from that of any other of the fossiliferous horizons of Great 

 Britain and deserves more attention than it has hitherto received. 



Alvania subperforata (Jeffreys). Plate LI, fig. 19. 



1884. Kissoa suhji)erforata, Jeffreys in Laniplugh, Quart. Journ. Geol. Soc, vol. xl, pp. 319, 320, 



pi. XV, fig. 2. 

 1893. Rissoa subperforata, A. Bell, Proc. Roj. Irish Acad. [3], vol. ii, p. G35. 



