328 PLIOCENE MOLLUSCA. 



Nyst reported a unique specimen of AT. pygmxa from the Scalclisien of Heyst 

 near Antwerp, but his drawing is not quite typical of that species, nor have 

 M. Van den Broeck and other continental authorities recognised it as a Belgian 

 fossil. 



It appears at present to be a comparatively southern form, only jnst reaching 

 as far north as the western part of the English Channel and to certain localities 

 on the Irish coast; it is reported by Prof. Br#gger as occurring in the colony 

 of Lusitanian shells which occupied the Christiania fiord during the later stages of 

 the Pleistocene epoch, and Dr. Scalia records it, under Turton's name of N. varicosa, 

 from the very recent fossiliferous beds on the flanks of Mount Etna already 

 alluded to. 



MM. Bucquoy, Dautzenberg, and Dollfus identify the present species with the 

 Buccinum tritonium of Blainville. 



Nassa (Hima) turonica (Deshayes). Plate XXXIV, figs. 11 — 14. 



1898. Nassa granifera, N. Jani, N. Perrierias, A. Bell, Trans. Roy. Geol. Soc. Cornwall, vol. xii, p. 14-. 

 1914. Nassa turonica, F. W. Harmer, Plioc. Moll. G-t. Brit., pt. i, p. 85, pi. v, figs. 14, 15. 



Remarks. — As stated above (p. 85), I follow the authors of the ' Mollusca of 

 Roussillon ' in substituting the name Nassa turonica, Deshayes, for X. granifera, 

 Dujardin, by which the present species was formerly known to students of the 

 Crag. 



In his paper on the Pliocene deposits of St. Erth (Inc. cit., p. 142) Mr. A. Bell 

 described provisionally two species as A'. Jani, Mayer, 1873, and iV. Tei'rierise, 

 Bellardi, 1882, stating that they might be found eventually to be varieties of the 

 Miocene form, N. granifera {turonica). An examination of the St. Erth fossils now 

 in the British Museum (Nat. Hist.) shows this view, I think, to be correct. Com- 

 paring them with a large number in my collection of this somewhat variable species 

 from the Faluns of Touraine, I find an equivalent of each of the specimens in 

 question, and I have therefore now figured them as varieties of Deshayes' shell. 



Sub-genus AMYCLA, H. and A. Adams, 1853. 

 Nassa (Amycla) semistriata (Brocchi). Plate XXXIV, fig. 24. 



1814. Buccinum semistriatum, Brocchi, Ooncli. foss. suliap., vol. ii, p. 651, pi. xv, fig. 15. 

 1844. Nassa semistriata, James, Journ. Geol. Soc. Dublin, vol. iii, pp. 62, 66. 



1873-5. Nassa semistriata, Seguenza, Boll. R. Com. Geol. Ital., vol. iv, p. 300, no. 142, 1873 ; vol. v, 

 p. 276, no. 49, 1874 ; vol. vi, p. 278. no. 275, 1875. 



