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LIMESTONE FROM THE NORTH SEA. 



15 



It .belongs more particularly to the Mio-Plioeene strata of Italy, 

 Belgium, Holland, and Austria, besides surviving in recent seas 

 (Mediterranean and Pacific). 



Family Aporrhaid^. 

 Aporrhais pespelicani (Linnaeus). 



Strombus pespelicani Linnaeus, ' Systema Naturae ' 10th ed. 1758, p. 742. 



Distribution. — Vindobonian (Austria, Italy) ; Plaisancian 

 and Astian (Italy, Prance) ; Anversian and Scaldisian (Bel- 

 gium) ; Lenham Beds (Britain) ; Coralline Crag to Post-Pliocene 

 (Britain) ; Becent (Mediterranean and British Seas). 



Family Natictd^:. 

 Naticina alderi (E. Forbes). (PI. II, figs. 7 & 8.) 



Natica alderi E. Forbes, ' Malacologia Monensis ' 1838, p. 31 & pi. ii, figs. 6-7. 

 Natica (Naticina) alderi Dolli'us, C. R. Assoc. Franc. Av. Sci. (Cherbourg. 

 1905) 1906, p. 368. 



Distribution. — Vindobonian (Holland) ; Messinian (Ger- 

 many) ; Bedonian (France) ; Coralline and Norwich Crags to 

 Post- Pliocene (Britain); Becent (Mediterranean and British Seas). 



Family Bingiculidje. 

 Bingiculella ventricosa (J. de C. Sowerby). (PI. II, figs. 9 & 10.) 



Auricula ventricosa J. de' C. Sowerby, 'Mineral Conchology' 1821, vol. v, 



p. 99 & pi. cccclxv, fig. 1. 

 Bingiculella auriculata var. ventricosa, Sacco, ' Moll. Terz. Piemonte ' 1892, 



pt. 12, p. 25; ibid. 1904, pt. 30, p. 110 & pi. xxiv, figs. 25-26. 



Remarks. — The shorter, broader, and more inflated volutions, 

 as mentioned by S. V. Wood, are sufficient to separate this species 

 from Brocchi's JR. buccinea, which belongs to the Italian Tertiaries 

 and existing seas. The genus is well known in the Mediterranean. 



Distribution. — Vindobonian to Astian (Italy) ; Scaldisian 

 (Belgium) ; Coralline Crag to Norwich Crag (Britain). 



Family Actionem;. 



Actjeon tornatilis (Linnaeus). 



Sulla tornatilis Linnaeus, ' Systema Naturae ' 10th ed. 1758, p. 728. 



Actceon striatus J. de C. Sowerby, ' Mineral Conchology ' 1821, vol. v, 



p. 87 & pi. cccclx, fig. 2. 

 Actceon tornatilis S. V. Wood, Monogr. Pal. Soc. (Crag Mollusca) 1848, 



p. 170 & pi. xix, fig. 5. 



Distribution. — Vindobonian (Holland); Plaisancian and 

 Astian (Italy) ; Anversian and Scaldisian (Belgium) ; Lenham 

 Beds (Britain) ; Coralline Crag to Post-Pliocene (Britain ) ; Becent 

 (Mediterranean and British Seas). 



