350 



CRETACEOUS LAMELLIBRANCHIA. 



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Figs. 110-122. — Ostrea diluviana, L. Sedgwick Museum, except 120, 121. 110, 111, Lower Greensand, 

 Upware. Left and right valves. 112-119, Lower Greensand, Faringdon. Left valves. 112-114, 

 anterior, interior and exterior of a left valve. 116, 117, interior and exterior of a left valve. 118, 

 119, interior and exterior of a left valve. 120, 121, zone of Pecten asper, Devizes. Museum of Practical 

 Geology, Nos. 25814, 25S12. 120, right valve. 121, left valve. 122, Chalk Marl, Folkestone. Left 

 valve. All x £. 



