350 



CRETACEOUS LA^IELLIBRANCHIA. 



Figs 110-122.— Osf,-ca dihn-iana, L. Sedgwick Museum, except 120, 121. 110, 111, Lower Greensand, 

 Upware Left and right valves. 112-119, Lower Groensaud, Faringdon. Lett valves. H-J-JJ*. 

 anterior, interior and e.tterior of a left valve. 116, 117, interior and exterior of a left valve, lis, 

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

 Geology, Nos. 25814, 2oS12. 120, right valve. 121, left valve. 122, Chalk Marl, Folkestone. Loft 

 valve. All x J. 



