384 PLIOCENE MOLLUSCA. 



Distribution. — Not known living. 



Fossil : Newbournian Crag : Foxliall. 



Upper Pliocene : Colli Astesi, Parma, Altavilla. 



Remarks. — -The specimen here figured is from the Jermyn Street Collection, 

 and is said to have been found at Foxliall. It corresponds with the Italian fossil 

 11. nevropleura more nearly than with anything else I can discover, being specially 

 characterised by its strong sculpture, the comparative flatness of the whorls, and 

 the absence of any distinct break between the mouth and the canal. The figures 

 given by Brugnone and Bellardi show the spire to be somewhat longer than in our 

 Crag fossil, but their shells belong to the same group and may be, at least, varieties 

 of the same species. R. nevropleura is a rather rare Italian and Sicilian form, 

 reported only from the Astian or Upper Pliocene deposits of that region and from 

 the Miocene of Touraine and Mayenne (Dollfus). 



Eaphitoma tenuistriata (A. Bell). Plate XXIX, figs. 31, 32; Plate XXXIX, 



fig. 16. 



1915. Raphitoma tenuistriata, F. W. Harmer, Plioc. Moll. Gt. Brit., pt. ii, p. 263, pi. xxix, figs. 31, 32. 



Distribution. — Fossil: Wexford gravels (additional). 



Remarks. — Mr. Bell has sent me a perfect specimen of this interesting fossil 

 from Wexford, which shows clearly the fine spiral striation characteristic of the 

 present species. Hitherto it has been reported as fossil from the English Crag 

 only, and is unknown as a living shell. 



Raphitoma mitrula (S. V. Wood). Plate XXIX, figs. 23—25; Plate XXXIX, 



figs. 10—13. 



1915. Raphitoma mitrula, F. W. Harmer, Plioc. Moll. Gt. Brit., pt. ii, p. 270, pi. xxix, figs. 23—25. 



Remarks. — At stated on p. 270, this species is exceedingly common in the 

 Waltonian Crag; I have obtained more than 1000 specimens from Oakley alone. 

 They vary considerably in size, in the greater or less convexity of the whorls, the 

 comparative length of the spire and the shape of the mouth ; I have been tempted 

 to consider some of them as specifically distinct. A careful examination of the 

 whole collection, however, has led me to a final conclusion that they may be 

 regarded as varieties of one species. For the assistance of collectors and in the 

 hope of saving them trouble, I have figured two or three more of the Oakley 

 fossils. 



They may possibly represent some incipient species, forms which, had the 



