866 PLIOCENE MOLLUSCA. 



of Scaldisien mollusca during my last visit to Antwerp. It differs so materially 

 from the type form of Atractodon elegans, which occurs, as stated above, in places 

 in the Red Crag of Suffolk and is fairly common in the Belgian Crag, that I was 

 inclined to regard it as specifically distinct ; the peculiar form of the sharply 

 pointed apex, however, and its characteristic sculpture correspond so exactly 

 with those of A. elegans that it is difficult to separate them. The special cliffei^ence 

 is that in the present shell the whorls are more convex, and the outer lip is more 

 expanded, making a less acute angle with the body- whorl and giving the mouth a 

 different shape. The present variety is not distinctly spindle-shaped, nor does it 

 show the callosity on the upper part of the inner lip characteristic of the normal 

 form. Possibly it may not have attained its full growth. It is an interesting 

 specimen and deserves notice. I have one or two fragments from Oakley which 

 may be the same. As it occurs in the horizon of the Belgian Crag corresponding 

 with the Waltonian, other examples may be found hereafter in our British 

 deposits. 



Since the above was written 1 have received a specimen from the York 

 Museum (PI. XXXVII, fig. 11) which is more or less intermediate between the 

 typical form and the Belgian variety. 



I have figured a specimen of the normal form of this shell (fig. 9) from 

 Antwerp, not only to show the difference between it and the variety injiata, but 

 also the non-derivative character (as I think) of the Scaldisien- Waltonian fossils. 



Genus NEPTUNEA, Bolten {continued from p. 173). 

 Neptunea contraria (Linne). Plate XVI, figs. 1, 2; PI. XXXVII, figs. 3—5. 



1848. Trophon antiquum, var. contraria carinata, S. V. Wood, Mon. Crag Moll., pt. i, p. 45, pi. v, 



fig. Ik. 

 1868. Fusus contrarius, Fischer, Journ. de Couch., vol. xvi, p. 36. 

 1911. Neptunea contraria, Sykes, Proc. Malac. Soc, vol. ix, p. 336. 

 1914. Neptunea contraria, P. W. Harmer, Plioc. Moll Grt. Brit., pt. i, p. 156, pi. xvi, figs. 1, 2. 



Distribution. — Recent: Porcupine Expedition, Sicilian Coast. Station 58. 

 Fossil; Coralline Crag: Boy ton (additional). 



Remarks. — During a recent visit to the York Museum Mr. Bell noticed a 

 minute and very young specimen of N. contraria (possibly var. informis), about 

 5 mm. in length, showing but three only of the upper whorls. It bears a label in 

 the writing of the late Dr. Reed, stating it was obtained from the Coralline Crag 

 of Boyton. The Red Crag occurs also at that place, as has been long known, 

 but from the appearance of our little shell I believe it is a genuine Coralline fossil. 

 If this is so, it is interesting, forming another connecting link between the Coralline 

 and Waltonian horizons, supporting also the view taken by Mr. Bell that the fauna 



