290 PLIOCENE MOLLUSCA. 



Varietal Characters. — Shell smaller than the type, with an inflated body- whorl 

 and an exceedingly short spire. 



Dimensions. — L. 7 mm. B. 4 mm. 



Distribution. — Recent : Greenland. 

 Fossil: Bridlingfton. 



Ttemarhs. — In Mr. Headley's collection of Bridlington fossils, the most of 

 which are nnsorted, there are several specimens of Bda which were snbmitted to 

 Jeffreys for identification and returned from him packed in separate boxes with 

 the names of the species attached to which they had been referred. Among these 

 there is one named in his own writing B. simplex, which was probably the example 

 upon which the insertion of that species in his list of Bridlington Mollusca 

 was based. 



It differs materially, however, from the figures of B. simplex published by 

 Prof. Gr. 0. Sars and Kobelt, which are those of a larger shell, 18 mm. in length 

 with a very wide and open canal, without longitudinal ornament, equivalent to 

 B. gigas, Verkriizen. 



I am disposed to refer the shell in question to the variety inflataoiB. deciissata 

 figured by Posselt, with which it seems to me accurately to correspond both in 

 form and in its delicate sculpture. The fine longitudinal ribs are confined to the 

 upper whorls, as in Posselt's figure. 



Var. conoidea, G. 0. Sars. Plate XXXI, figs. 28, 29. 



1878. Bela conrAdea, Gr. O. Sars, Moll. Rpg. Arct. Norv., p. 236, pi. svi, fig. 14. 



1886-1901. Bela decussata, var. conoidea, Friele, Norske Nordh. Exped. (Mollusca), pt. ii, p. 18, 



pi. viii, fig. 14, 1886; pt. iii, p. 91, 1901. 

 1905. Bela decussata conoidea, Kobelt, Icon, schalentrag. europ. Meeresconch., vol. iii, p. 2-59, 



pi. Ixxxiii, fig. 13. 



Varietal Characters. — Shell elongato-f usiform ; longer and narrower than in 

 the type ; whorls but little convex ; longitudinal ribs curved or oblique. 



Dimensions. — L. 10 — 15 mm. B. 4 — 6 inra. 

 '_ Distribution. — Recent : Finmark. 



Fossil : Icenian Crag : Bramerton. 



Remarks. — The Bramerton fossil here figured has been determined by Dr. 

 Odhner, who has also kindly sent me a Recent specimen for comparison. 



Originally described as a distinct species it has been more recently regarded 

 by Mr. Friele, Dr. Sparre Schneider and others as a variety of B. decussata, with 

 which species it is closely allied. At present it is only known in a living state 

 from Finmark, near the coasts of which it has been dredged in 223 to 259 fathoms. 



