TAB. XV. 



Fig. 



1. Trigonia decorata, p. 133. 



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



3. Pholadomya Ssernanni, p. 123. 



4. Heraulti, p. 124. 



5. Isocardia cordata, p. 135. 



6. 7. Avicula Braamburiensis, p. 129. 

 8a. Gresslya peregrina, p. 13j>fcf 

 8d. Portion of surface, magnified. 

 9. Lima punctaturn, p. 130. 



9b. Portion of surface. 



lOa. Myacites decurtatus, p. 137. 



105. Portion of surface. 



11 a. 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. 



