284 PLIOCENE MOLLUSCA. 



those lost) in which the transverse lines were somewhat coarser than in the type ; 

 in the imperfect example here figured, agreeing as far as it goes with a Recent 

 shell from Stockholm, they are equally fine. 



Mr. Friele says that the dental structure of the animal shows clearly its 

 relation to B. riigulata, though its elongate spire is conspicuously different. The 

 Recent shell is said by Prof. Sars to reach 23 mm. in length. 



Var. Schneider!, nov. Plate XXXI, figs. 15, 16. 



Varietal Character,^. — Differs from the type in its more slender and elongate 

 spire, its less expanded body- whorl, and especially in the coarseness of its 

 sculpture, both longitudinal and transverse, which is more or less tuberculate at 

 the points of intersection. 



Dimensions. — L. 12 — 15 mm. B. 5 — 6 mm. 



Distribution. — Not known living. 



Fossil : Coralline Crag : Boyton. Waltonian : Little Oakley. 

 Newbournian : Waldringfield, Sutton. Butleyan : Hollesley, Butley. Icenian : 

 Bramerton ; probably elsewhere in the Crag. 



Pleistocene : March gravels. 



Remarks. — The present seems a very distinct form, not very rare in the Crag, 

 differing, especially in its strong and often tuberculate sculpture, from any species 

 of Bela hitherto described, either Recent or fossil. 



It departs from the type of B. rugulata in its more slender and elongate spire, 

 which approaches that of B. turricida ; in that species, however, the spiral 

 sculpture is finer and more uniform. The body-whorl is never expanded or 

 tumid as in the former, the upper whorls diminishing gradually so as to form a 

 turreted, regularly tapering and attenuated cone. The spiral ridges of the 

 present form are strong and closely crowded together, becoming tuberculate, 

 forming a well-marked band on the keel, the tuberculations ceasing, however, 

 towards the base of the shell. At first I was disposed to regard it as specifically 

 distinct, but most of my Scandinavian friends consider it a variety of B. rugnlata, 

 a view which I now adopt, especially as I have lately received from Di-. Nord- 

 mann a Recent specimen from Iceland of an intermediate character, to some 

 extent connecting the two forms. 



Var. bergensis, Friele. Plate XXXI, figs. 22, 23. 



1886. Bela rucjutata, var. hergensis, Friele, Norske Nordh. Exped. (Mollusca), vol. ii, p. 4, \A. vii,figs. 



5,6. 

 1910. Bela rurjvlata, var. bergensis, Odhner, Kongl. Svenslc. Vet-Akad. Handl. Stockholm, vol. vii, p. 11. 



