246 Mr. S. V. Wood's Catalogue of Shells from the Crag. 



* Only one worn specimen, which is therefore doubtful. 



-f I have only two or three specimens, and those are not in good condition. 



% Half a dozen specimens that I possess are unfortunately all the right valve, 

 and I suspect it does not strictly belong to this genus. 



§ An equivalved shell, somewhat resembling C. striatella, Deshayes, Coq. foss. 

 des Env. de Paris, PI. 8. f. 15. 



