282 PLIOCENE MOLLUSCA. 



proportion, lie considered immature. I have found both forms in the Crag, but my 

 specimen of the larger kind, after having been identified at the Stockholm Museum, 

 was unfortunately lost in the post with some other Oakley Belas on its way back.^ 

 Those of the smaller type, now figured, from Boy ton, Oakley, and Butley, agree 

 with a Recent specimen from Iceland. A similar fossil was found at Cranstal in 

 the Isle of Man by the Rev. S. N. Harrison. 



B. nohilis appears in Morcli and Poulsen's MS. list of Mollusca from the Crag 

 of Iceland, and Mr. A. Bell found it some years ago in the Pleistocene deposits of 

 King Edward in Banffshire, in N.B. Scotland, and at Clava in the Nairn Valley. 



Like B. scalaris it is a distinctly circumpolar form, with a range almost 

 exclusively to the north of the Arctic circle. Mr. Friele states that in the 

 Norwegian North Atlantic Expedition it was found only at Hammerfest and 

 Tromso, and not far from the coast. 



Bela rugulata, Troschel. Plate XXXI, figs. 5, 11, 12. 



1866. Bela rucjuJata (Moller), Troschel, G-eb. Sclineck., vol. ii, p. 44, pi. iv, fig. 6. 

 .1878. Bela rugulata, G. 0. Savs, Moll. Reg. Arct. Norv., p. 230, pi. xxiii, fig. 6. 



1884. Bela rwjiilata, Morch and Poulsen, MS. list in Geological Museum, Copenhageu, no. 37 

 (unpublished). 



1886. Bela rugnlata, Friele, Norske Nordh. Exped. (Mollusca), pt. ii, p. 3, pi. vii, figs. 1 — 7. 



1887. Bela rurjulata, Kobelt, Martini und Chemnitz, Conch. Cab., ed. 2, vol. iv (Pleurotomidse), 

 p. 143, pi. xxxi, fig. 7. 



1905. Bela turricula rvgidata, Kobelt, Icon, schalentrag. euro]). Meeresconch., vol. iii, p. 239, 



pi. Ixxxii, figs. 6 — 9, 14 — 16. 

 1910. Bela rugnlata, Odhner, Kongl. Svensk. Vet-Akad. Haudl. Stockholm, vol. vii, p. 11. 



Specific Characters. — Shell carinated, ovato-fusiform ; whorls 6 — 7, the last 

 ventricose, about two-thirds the total length, sharplj^ angulated by the keel, with 

 a sloping shelf below the suture ; spire short, rapidly diminishing ; apex twisted, 

 ending in a blunt and rounded point; ornamented by well-marked longitudinal 

 ribs, intersected by fine, unequal spiral ridges which are slightly thickened where 

 they cross the ribs, that on the keel being nodular, continuous and thicker than 

 the others ; mouth oblong, ending in a short and rather wide canal ; outer lip 

 strongly angulated ; columella flexuous. 



Dimensions. — L. 12 mm. B. 7 mm. 



Distrilmtiun. — Recent : Christiania Fiord to Finmark ; Iceland, Greenland. 



Fossil : Coralline Crag : Boyton. AValtonian : Little Oakley, 

 Isle of Man ? Pleistocene : March gravels. 



Pliocene : Iceland. Pleistocene : Christiania Fiord. 



Bemarlcs. — One or two specimens from Oakley which had been identified as 



^ This parcel was traced as far as Berlin, to which it had been mis-sent. The chance of its turning 

 up again is not promising. 



