300 PLIOCENE MOLLUSCA. 



Dimensions. — L. 10 mm. B. G mm. 



Distribution. — Not known living. 



i'bss// ; Butleyan Crag: Butley. 



liriDrirls. — One of the specimens now figured is fi'om the British Museum, 

 where it has been labelled Bela snqiialis ?, S. V. W., the other was obtained by 

 Mr. P. G. H. Boswell, both of them being from Butley. They seem to me, 

 however, to approach more nearly that last described, than Wood's figure of the 

 former,^ and I prefer to regard them as a varietal form of it. 



In some respects they resemble D. dectissata, Couthouy, but not sufficiently, 

 I think, to be associated with it. 



Bela bicarinata (Couthouy, non Wood). Plate XXXII, fig. 27. 



1839. Pleurofoma bicarinata, Couthouy, Boston Jouni. Nat. Hist., vol. ii, p. 104, pi. i, tig. 11. 

 1841-70. Pleurotoma bicarinata, Gould, Eep. luv. Mass., ed. 1, p. 281, fig. 186, 1841 ; ed. 2, p. 349, 



fig. 618, 1870. 

 1871. Pleurotoma bicarinata, A. Bell, Ann. Mag. Nat. Hist. [4], vol. vii, p. 356. 

 1878. Bela bicarinata, G. O. Sars, Moll. Eeg. Arct. Norv., p. 237, pi. xvi, figs. 11, 12. 

 1886-1901. Bela bicarinata, Friele, Norske Nordh. Exped. (Mollusca), pt. ii, p. 15, pi. viii, fig. 18, 



1886; pt. iii, p. 92, 1901. 

 1899. Bela bicarinata, Posselt, Medd. om Groul., vol. xxiii, p. 155. 

 1905. Bela bicarinata, Kobelt, Icon, scbaleutrag. europ. Meerescouch., vol. iii, p. 261, pi. Ixxxiii, 



fig. 14. 



Specific Characters. — Shell minute, rather fragile, fusiform ; whorls 5 — 0, 

 convex, angulato-carinate, attenuated Ijelow, the last three-fifths the total length; 

 spire short, with an obtuse apex ; suture deep, subcanaliculate ; ornamented by 

 spiral ridges, two of them being more pi'ominent than the rest, the upper one 

 forming a distinct keel ; mouth oblong, about half the length of the shell, 

 slightly angulated by one of the ridges; canal short, open. 



Dimensions. — L. 6 — 9 mm. B. 2 — 3 mm. 



Distrihntion.—Iiecent : Norwegian coast, from Christiania Fiord to Finraark, 

 Lofoten Islands; Greenland; Spitzbergen, Murnian coast; New England coast. 

 Fossil: Butleyan Crag: Butley (A. Bell). 



Pleistocene: Murman Coast, Spitzbergen (Knipowitsch). 



Remarks. — I figure a Recent specimen for the guidance of collectoi's, to show 

 wherein it differs from the form hitherto known under that name to students of the 

 Crag. Gould states it may be easily distinguished by its two spiral ridges. 



Bela plicifera (S. V. Wood). Plate XXXII, fig. 28. 



1848. Clavatula plicifera, S. V. Wood, Mou. Crag Moll., pt. i, p. 64, pi. vii, fig. 15. 



Specific Gliaracters. — Shell small, ovato-fusiform ; whorls 5 or 6, slightly 

 1 Mou. Crag Moll., 1st Suppl., pt. i, p. 44, pi. iii, fig. 17, 1872. 



