104 JOURNAL OF CONCHOLOGY, VOL. 15, NO. 4, OCTOBER, 1916. 



Gastrana laminosa J. de C. Sowerby [Plate 2, figs. 14, 15]. 

 Petricola laminosa J. de C. Sowerby: Mineral Conchology, 1827, 



vol. 6, pi. 573, p. 142. 

 Gastrana laminosa S. V. Wood : Men. Pal. Soc, 1857, pi. 25, 

 fig. I, p. 217. 



Distribution — 



Scaldisian Belgium 



Red Crag ^ 



Coralline Crag \ '" 

 Lenham Beds J 



Britain. 



Collection — 



M.P.G., No. 428 (associated in sandstone block with Panopaa 

 7nenardi). 



Fam. MACTRID^. 



Spisula arcuata J. Sowerby [PI. 2, figs. 10, n]. 



Mactra arcuata J. Sowerby: Mineral Conchology, 181 7, vol. 2, 

 pi. 160, figs. I, 6, p. 135. 

 Post-Pliocene "j 

 Norwich Crag \ •-• 

 Red Crag J 



Scaldisian 

 Lenham Beds 

 Diestian ^ 



Bolderian / 



Collections — 



M.P.G., No. 429; C.R., 1257 to C.R., 1260. 

 B.M. (Graham Wallas). 



Spisula subtruncata DaCosta. 



Trigotiella subtrmicata DaCosta: British Conchology, 1778, p. 198. 

 Spisula subtruncata Sacco : Moll. Terz. Piemonte, 1901, part 29, 

 pi. 6, figs. 3-8, pp. 25, 26 (including varieties). 



Distribution — 



British and Mediterranean Seas 



Britain 



Belgium 

 Britain 



Belgium. 



Recent 



Post-Pliocene 



Norwich Crag 



Red Crag 



Scaldisian 



Astian 



Plaisancian 



Britain. 



Belgium 



Italy 



... France (S.) ; Italy 



