402 



CRETACEOUS LAMELLIBRANCHIA. 



Figs. 20i-2ia.-Exo,jyra sinuata (Sow). 204, 205, left an,l li-ht valves of one uulividual ; Hythe 

 lieds, Ilythe; Seds,nvick Museum. 206, 207, 210, Claxby Ironstone, Uonmn^'ton ; bedgwick 

 Museum ; 20(5, 210, left valves ; 207, right valve of 20(5. 208, 209, Hythe Beds Hythe. Museum 

 of Practical Geology, No. 21W21. Left and right valves (/,rri(7«(a form). 211 bpeeton C aj, 

 (zone of B. JateralU). Speeton. Mr. Lan.plugh's Colleetion. Left valve. 2 2, 2Ki. Speeton Clay, 

 Speeton. Sedgwick Museum. Left and right valves ot one individual. AU x „. 



