Plate III. 



Figs. 1 a-c. Niicula similis 3. Sow. 1 с Posterior view. 



- 2, 3 a-b. Mytilus affinis J. Sow. Internal moulds. 2. X 2. 



- 4 a-b. Modiola cfr. simplex J. Sow. Wax mould. 



- 5 a-b. Astarte cfr. tenera Morris. 



- 6 a-b. Cyrena Gravesii Desh. Cast. 



- 7 a-b. - - - . Wax mould of interior of a specimen 



from Cuise-la-Motte, France. 



- 8-9. Cyrena Gravesii Desh. 



- 10. Tellina sp. 



- 11. Psammobia sp.? 



- 12. Erycina sp. Internal mould, x 2. 



- 13. Donax sp). Internal mould. 



- 14 a-b. Cryptodon cfr. unicarinatus Nyst sj). X 2. 



The figures are of the natural size, except where otherwise 

 stated. 



All the specimens figured are preserved in the Mineralogicai 

 Museum of the University, Copenhagen. 



