198 PLIOCENE MOLLUSCA. 



The figures of ^S'. Sarsii given by Prof. G. O. Sars, S. V. Wood and Prof. Kobelt 

 are smaller, the S|)iral sculpture is more distinct and regular, and the canal is clearly 

 defined. *S'. Moehii, Dunker and Metzger, whicli the latter authorities regard as a 

 variety of 8. Sarsii, is a similar form, but the spire is more elongate. 



Messrs. Dautzenberg and Fischer remark that ;S^. ehur and S. Snr-sii may l)e 

 the different forms of the same species, but in default of more evidence they think 

 the question may be left in abeyance for the present. 



Sipho Sarsii (Jeffreys). Plate XXII, fig. 12; Plate XXIV, fig. 9. 



1869. Fusus Sarsi, Jeffreys, Nature, vol. i, p. 168. 



1878. Sq^Jio Sarsii, Gr. O. Sars, Moll. Eeg. Arct. Norv., p. 275, pi. xv, fig. 2. 



1887. Neptunea Sarsii, Kobelt, Icon, sclialentrag. europ. Meerescoucli., vol. i, p. 79, pi. xiii, fig. 8. 



SjJecific Characters. — Shell thin, ovato-fusiform ; whorls convex, the last 

 ventricose, excavated below ; ornamented by fine and more or less regular and 

 well-marked spiral lines ; spire short, apex obtuse ; suture deep ; mouth ovate, 

 angulated above ; canal short, turning slightly to the left, ending in an oblique 

 notch. 



Dimensions. — L. 30 mm. B. 15 mm. 



Distribution. — Recent : Shetland Isles, Finmark, western Norway, Lofoten Islands 

 (Sars), Russian Lapland, Greenland, New England coast. 



Fossil : Waltonian Ci*ag : Little Oakley. Newbournian : Wal- 

 dringfield. Butleyan : Butley. Pleistocene : Bridlington (Jeffreys) ; Norway 

 (0yen.) 



liemarks. — Jeffreys' collection of mollusca found its Avay to America, and w ith 

 his unfigured type-specimen of 8. Sarsii is now in the U.S. National Museum at 

 the Smithsonian Institution. Dr. Dall has been kind enough to compare with the 

 latter a photograph of the fossil from Butley, now figured (PI. XXII, fig. 12), and 

 reports it to be the same. The sculpture of this shell is more delicate and clearly 

 defined than that of 8. ehur ; I have one or two other specimens, immature and 

 imperfect, from Oakley, which seem to correspond with it. 



In the shells figured })y Wood and by Prof. G. 0. Sars as 8. Sarsii, the sculj)- 

 ture is of a coarser character, the spire is shorter and the whorls ai'e ventricose. 

 Sars says his form is " soHdula.'^ I have a specimen from Oakley here given as var. 

 crassa (PI. XXIV, fig. 9), identified by Canon Noi-man some years ago as 8. Sarsii, 

 whicli is thick and strong, and although worn, shows some slight traces of its original 

 spiral sculpture. It belongs, I think, to the Sarsii group rather than to those des- 

 cribed above as 8. ehur. Prof. Kobelt states that while 8. ehur belongs to the sub- 

 genus Si'phoiiorhis, 8. Sarsii is a true Sipho, l)ut possibly this is a mistake. 

 Although all my Crag fossils of 8. Sarsii have lost the apex, there is a Recent 



