164 PJ.IOCENE MOLLUSC A. 



Bemarls. — This sharply keeled shell seems to be the prevalent form of the 

 (lesjMcta group in circumpolar seas at the present day, but it is not common in 

 the Crag. I have a full-grown specimen from the Poederlien of Antwerp, a few 

 others, immature, from the Red Crag of Oakley and Ramsliolt, and there are several 

 in the Castle Museum at Norwich from the Icenian of Bramerton. Prof. G. O. Sars 

 states that this strongly keeled form is more commonly found as young specimens. 



It is generally known to Scandinaviau conchologists under the varietal and 

 very appropriate name of cariiiafa, but Pennant's Murex carinatus seems to repre- 

 sent the variety last described. MM. Dautzenberg and Fischer have recently 

 identified the present shell w"ith the var. snhautlquata of Ma ton and Rackett, with 

 whose figure it agrees. Lister's figure ('Hist. Conch.,' vol. iv, pi. 1057, fig. 1, 

 1688) represents a typical example of this variety. 



Through the kindness of Prof. Lonnberg and Dr. Odhner I am able to figure 

 a typical Recent specimen of this variety from the Zoological Museum at Stock- 

 holm, which corresponds with our fossils from the English and Belgian Crag. 



Var. behringiana, Middendorff. Plate XVII, fig. 8. 



1849. Trilon.ium (Fiisus) antiquum, var. Behrincjlana, Middeiidoili", Beitr. z. Mai. Ross., pt. ii, p. 131, 



pi. ii, figs. 3, 4. 

 1898. Fusus {Neptunea) anfiquus, var. hrevispira, F. W. Harmer, Proc. Intern. Congress Zool. 



(Cambridge), p. 22(3, pi. iii, fig. 8. 



Dimensions.- — L. 6o mm. B. 45 mm. 



Distribution. — Bcceut : Kamtchatka, Behring Sea, Sea of Okhotsk. 

 Fossil : Waltonian Crag : Little Oakley. 



Bemarks. — The specimen here represented was described by me in 1898 as an 

 abnormal form of N. antiqna. It is very distinct, closely resembling the Behring 

 Sea shell figured by Middendorff, and may be regarded, I think, as nearly related 

 to it. Its short spire and the banded sculpture of the Crag fossil, so far as it can be 

 made out from its worn condition, seem rather to connect it with V. tlespeda than 

 with N. antiqna.; I have met with only one specimen of it. 



Var. Cobboldiae, no v. Plate XVIII, figs. 8, 9. 



1812. Murfx striatns, J. Sowerby, Min. Conch., vol. i, p. 61, tab. xxii. 

 1834. Fusus striatus, J. Sowerby, Syst. Ind., p. 247. 



Dimensions. — L. 55—100 mm. B. 82—60 mm. 



Distribidion. — Newbournian Crag : FeHxstow, Holywell. Butleyan : Butley, 

 Bawdsey. Icenian : Bramerton, Dunwich. 



RemarJcs — The Butley fossils here represented are from my own collection, and 



