OSTREA. 



359 



Fig. 14-2. — Ostrea cunabula, Seel. Cambridge Greensand (base of Chalk Marl). A, b, British Museum, 

 No. 67740. c-i, Sedgwick Museum, a, b, left valve, c, left ; d. right valve ; e, anterior view of c, d. 

 f, right valve with other oysters on the surface, g, left valve, h, i, exterior and interior of a left valve. 

 All x a. 



