BUCCINUM FINMARCHIANUM. 101 



Specific Ghm-ai'levs. — Shell thin ; whorls convex, ang-nhited above, forming a 

 sloping shelf l)elo\v the suture, the last about two-thirds the total length, excavated 

 below, covered with spiral lines, some of them more prominent than the others, 

 the one next below the suture often forming a well-marked keel ; spiral 

 ornamentation usually clathrated by the indistinct and irregular longitudinal 

 plications or lines of growth ; mouth wide, angulated above, ending in a short 

 open canal; outer lip thin, regularly curved; columella twisted and excavated. 



Bbnens'ions. — L. 55 — 85 mm. B. 85 — 50 mm. 



lJi>>f.f'ihution. — llecenf: Nova Zembla, Spitzbergen, Greenland; N. Asiatic 

 Coast to Behring Sea. 



Fos.^il : Waltonian Crag : Little Oakley. Newboiu'nian ; Butleyan 

 (R. Bell) ; Icenian. 



Occasionally found in the YoJdia clay (Norwegian Pleistocene), and in the post- 

 glacial deposits of Norway. 



Benin ii'>^. — Among the specimens of Bnccininn in my collection from Oakley, I 

 have one or two, imperfect or not full-grown, of this variable and arctic species. 

 It seems specially distinguished by the angulation of the whorls by one of the 

 spiral ribs, which forms a sloping shelf below the suture, and generally by its 

 clathrated ornamentation . 



Dr. 0yen has been kind enough to send me a specimen (imperfect) from 

 Getinge, Halland (Norway), which I have figured together with one of my 

 Oakley fossils. B. terrse novae was dredged by the Norwegian Expedition from 

 a depth of GO fathoms. 



Buccinum finmarchianum, Verkriizen. Plate VII I, fig. o. 



1875. Buccinum finmarchianum, Yerkvuzen, Jalivb. Deutseli. Malak. GeselL, vol. ii, p. 237, pi. Mii, 

 fig.. 1-8. 



1878. Buccinum finmarchianum, Gr. O. Sars, Moll. Reg. Arct. Now., p. 262, pi. xiii, fig. 10. 



1882-1901. Buccinum finmarchianum, Friele, Norske Nordh. Exj^ed. (Mollusca), vol. i, p. 30, 1882; 

 vol. iii, p. 99, 1901. 



1883. Buccinum Finmarhianum, Kobelt, Martini und Clieinuitz, Conch. Cab., ed. 2, vol. iii (Buc- 

 cinum), p. 24, pi. Ixxvii, figs. 4, 6. 



1887. Buccinum finmarhianum, Kobelt, Icon, schalentrag. europ. Meeresconch., vol. i, p. 103, pi. xviii, 

 fig. 7. 



1910. Buccinum finmarchianum, Odhner, K. Sveusk. Veten. Akad. Haudl., vol. vii, p. 13. 



Specific Characters. — Shell rather thin, ovato-conical ; whorls more or less 

 convex, the last much the largest, nearly twice the length of the spire ; suture 

 well-marked ; mouth ovate, acutely angulate above ; in the Crag specimens half 

 the total length; outer lip regularly arched, not expanded; inner lip forming a wide 

 glaze upon the pillar; surface of the shell covered Vv^ith spiral lines, sometimes 

 inconspicuous, without longitudinal plications ; canal very short, notched. 



