TAB. XV. 



Fig. 



1. Trigonia decorata, p. 133. 



2a, b. Ceroinya concentrica, p. 108. 



3. Pholadoniya 833111311111, p. 123. 



4. „ Heraulti, p. 124. 



5. Isocardia cordata, p. 135. 



6. 7. Avicula Braamburiensis, p. 129. 

 8a. Gresslya peregrina, p. 138. 



8b. Portion of surface, magnified. 



da. Lima punctatum, p. 130. 



9b. Portion of surface. 



10a. Myacites decurtatus, p. 137. 



10b. Portion of surface. 



11a. Myacites Beanii, p. 136. 



lib. Surface of ditto. 



12. Cast of Quenstedtia oblita, p. 96 ; showing muscular im- 



pressions, &c. (from Mr. J. G. Lowe's collection). 



13. Myacites Scarburgensis, p. 138. 



14. Pholadomya ovalis, p. 139. 



