PLATE 72. 



1. Andmia simplex Orblgny, side view. p, 37. 



2. The same, from below, p. 37. 



3. Siliqua costata Say. p. 64. 



4. Ensis directus Conrad, p. 64. 



5. Anomia aculeata Linne, from above. 12 mm. p. 37. 



6. The same, from below, p. 37. 



7. The same, sculpture enlarged. p. 37. 



8. The same, smooth variety, p. 37. 



9. Modiolaria corrugata Stlmpson. 12 mm. p. 39. 



10. Crenella glandula Totten. 12 mm. p. 39. 



11. Pecten irradians Lamarck, typical form. p. 34. 



804 



