PLATE 72 



1. Anomia simplex Orbigny, side view. p. 37. 



2. The same, from below, p. S7. 



3. Slllqua costata Say. p. 64. 



4. Ensls dlrectus Conrad, p. 64. 



5. Anomia aciileata Llnne, 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. Modiolarla corrugata Stimpson. 12 mm. p. 59. 



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



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



