192 PLIOCENE MOLLUSCA. 



Varietal Chardctr'rs. — The Cra^ specimens of this variety are stronger and more 

 solid than the type, differing from it also in their more regular form ; the canal is 

 shorter, straighter, less semitubular, tortuous or distorted ; the spiral sculpture is 

 very fine and generally inconspicuous. 



Dimensions. — L. 45 mm. B. 10 mm. 



Distribution. — Fossil : Coralline Crag : Boyton. Waltonian : Little Oakley ; 

 probably elsewhere in the Red Crag. 



Scaldisien : Antwerp. 



Bemarlcs. — In 1878 Prof. Sars identified a unique specimen, described the year 

 before by Jeffreys as Fasns attenuatus but not figured, with his variety attennata 

 of 8. tortuosits.^ In 1883, however, the latter authority expressed his dissent from 

 this,^ a view which Mr. E. R. Sykeshas since supported, having found and figured 

 Jeffreys' original shell, ^ 



The fossils here represented have been submitted to Prof. G. 0, Sars and iden- 

 tified by him as identical with his variety attenuata ; they differ materially from 

 the type-form of 8. tortuosus, and seem to me, as to Prof. Kobelt, to be almost 

 deserving of specific distinction. I agree with Mr. Sykes, however, that our 

 Crag shells are not the Fusiis atteimatiis of Jeffreys. 



I have several specimens in my collection of the same form from the Scaldisien 

 of Antwerp. 



Var. lirata, no v. PI. XXIV, figs. 11—15. 



1879. Trophon propinqmis, S. V. Wood, Mou. Crag Moll., 2ud SuppL, p. 7, tab. ii, fig. .5. 

 (P) 1885. Fusus (jracilis, Lorie, Arch. Mus. Teyler [2], vol. ii, p. 93, pi. v, fig. 26. 



Varietal Characters. — Differs from the type in its stronger and clearly 

 chiselled sculpture ; the canal is somewhat longer, and neither twisted nor distorted ; 

 the spiral lines resemble those of Sipho Sabinii, but the shell is smaller, the whorls 

 are less convex and the apex is planorboid. 



Dimensions. — L. 36 mm. B. 15 mm. 



Distribution. — Fossil : Coralline Crag : Gedgrave, Boyton. Waltonian : Little 

 Oakley. Newbournian, Butleyan. Icenian. Isle of Man. 



Poederlien : Antwerp. Amstelien : Holland (?). 



Remarks. — This form associates itself with Prof. G. 0. Sars' variety attenuata 

 rather than with the typical 8. tortuosus. It is not by any means common in the 

 English Crag, although it ranges from the Coralline to the Icenian horizon. I have 

 specimens in my collection from several localities, and M. van der "Wouver has 



1 Ann. Mag. Nat. Hist. [4], vol. xix (1877), p. 326. 



2 Proc. Zool. Soc, 1883, p. 395. 



3 Proc. Malac. Soc, vol. ix (1911), fig., p. 337. 



