TAB. X. 



Fig. 



1. Pinna affinis, page 55. 



a. view of the left valve. Specimen from Bognor. Mus. Edwards. 

 c. var. intermedia. Mus. Prestwich. 



2. Pinna pyriformis, p. 57. Mus. Prestwich. 



3. Pecten duplicatus, p. 41. 



A strongly imbricated specimen of the left valve, with perfect auricles, from 



Highgate. Mus. Wetherell. 



4. Ostrea zonulata, p. 34. Mus. Fisher. 



5. Modiola diversa,j». 74. 



Fragment of a specimen, enlarged. Mus. Edwards. 



The line denotes the size of the specimen. 



