384 



CRETACEOUS LAMELLIBRAXCHIA. 





I 



189 



I :^ 



/ 



191 



Figs. ISi — 102. — Oslvea semiplana, Sowerby. 183 — 190, Zone of BeUmnilMa mwronaia, Norwicb. 

 183—185, risybt valvo, and interior and exterior of left valve of one individual; Norwich Museum. 

 18(), 18", left ami ri^jlit valves of one individual ; Sedgwick Museum. ISS, left valve (tlie riufbt 

 valve is concave) ; Sedgwick Museum. 189, 190, left and riglit valves of one individual ; Norwich 

 Museum, No. 2 lul. 191, 192. Zone of Actinocamax gitadi-ahts. East Harnham. Dr. Blackniore's 

 Collection. Exterior and interior of a right valve. All x J. 



