PLATE S 6 



1. Panomya arctlca Lamarck. Off Owl's Head, Maine, 8.5 Inches, p. 68. 



£. Anatlna llneata Say. Sanibel, Florida. 2 inches, p. 65. 



3. Anatina canaliculata Say. 2.5 inches, p. 65. 



4a, 4b. Ti'ansennella stimpsonl Ball. Egmont Key, Florida. 14 mm. p. 51. 



5. Periploma papyratia Say. 17 mm. p. 40. 



6. Transennella conradina Dall. West Florida. 12 mm. p. 51. 



7. Mya arenaria Linn6. Stonington, Connecticut. 3.5 inches, p. 66. 



8. Mya truncata Linne. New England. 58 mm. p. 66. 



9. Mesodesma arctata Conrad. North Triiro, Massachusetts. 2 inches, p. 66. 

 10a, 10b. Ervilia nitens Montagu. Antilles. 8 mm. p. 66. 



11. Ervilia concentrica Gould. 5 mm. p. 66. 



