PLATE S 



1. Nucula proxima Say. West Florida. 12 mm. p. 25 



2. Nuculana acuta Conrad. Sanlbel, Florida. 9 mm. p. 26. 



3. Solemya velum Say. New England. 1 inch. p. 25. 



4a, 4h. Yoldia llmatula Say. Raritan Bay, New Jersey. 2 inches, p. 26. 



5. Yoldia sapotllla Gould. Maine. 23 mm. p. 26. 



6a, 6b. Glycymeris americanus lineatus Reeve. Yamato, Florida. 29 mm. p. 29. 



7. Glycymeris pennaceus Lamarck. Yamato, Florida. 29 mm. p. 29. 



8. Glycymeris pectinatus Gmelin. Florida Keys. 29 mm. p. 29. 



9. Macoma constricta Bruguiere. Sanibel, Florida. 2 inches, p. 59. 



10. Area secticostata Reeve. Sanibel, Florida. 3.5 inches, p. 27. 



11. Area campechiensis pexata Say. Long Island, New York. 2.25 inches, p. 26. 



12. Glycymeris americanus Defrance. Vieques, Porto Rico. 60 mm. p. 29. 



13. Area campechiensis americana Wood. North Carolina. 3 inches, p. 27. 



