Plate 28 

 ATLANTIC: COAST BIVALVES 



a. COMMON EASTERN OYSTER, Crasso- 



strea virgiiiica Gmelin, 3 inches (entire 

 Atlantic Coast), p. 375. 



b. SPONGE OYSTER, Osirea permoUis Sby., 



2 inches (North Carolina to West In- 

 dies), p. 374. 



c. CRESIED OYSTER, Ostren eqiiestris Say, 



2 inches (North Carolina to West In- 

 dies), p. 373. 



d. COON OYSTER, Ostrea Irons L., 2 inches. 



Two forms. (Florida and West Indies), 

 p. 373. 



e. DISCORD MUSCULUS, Mnscidus discors 



L., 1 inch (North Atlantic and North 

 Pacific), p. 355. 



f. SMOOTH MUSCULUS, Mnscnlus laevi- 



gatus Gray, 1 inch (North Atlantic and 

 North Pacific), p. 355. 



g. BLACK MUSCULUS, Mnscnlus niger 



Gray, 2 inches (Arctic to North Caro- 

 lina; also to Washington), p. 355. 



h. ATLANTIC RIBBED MUSSEL, Modiohis 

 demissus Dillwyn, 3 inches (Canada to 

 South Carolina), p. 351. 



i. ATLANTIC PAPER MUSSEL, Amygdnlnm 

 papyria Conrad, 1 inch (Maryland to 

 Texas), p. 353. 



j. GLANDULAR CRENELLA, Creuella 

 glandida Totten, ^/s inch (Labrador to 

 North Carolina), p. 350. 



k. GIANT DATE MUSSEL, Lithophaga an- 

 tiUanim Orb., 4 inches (Gulf of Mexico, 

 south), p. 357. 



1. FLATTENED CARDITA, Venericardia 

 perphnia Conrad, 34 i"ch (North Caro- 

 lina to Florida), p. 380. 



m. BLACK DATE MUSSEL, Lithophaga nigra 

 Orb., 2 inches (Florida and West In- 

 dies), p. 355. 



n. MAHOGANY DATE MUSSEL, Litho- 

 phaga bisnlcata Orb., 1 inch (Florida 

 to Argentina), p. 357. 



o. LENTIL ASTARTE, Astarte snhequilatera 

 Sby.. 1 inch (Arctic Seas to off Georgia). 

 p. 376. 



p. CORAL-BORING CLAM, Coralliophaga 

 coralliophaga Gmelin, V/j inches (Gulf 

 and West Indies), p. 382. 



q. BOREAL ASTARTE, Astarte borealis 

 Schumacher, 1 V2 inches (Arctic to 

 Massachusetts; to Alaska), p. 375. 



r. WAVED ASTARTE, Astarte undata 

 Gould, 1 inch (Gulf of Maine), p. 376. 



s. SMOOTH ASTARTE, Astarte castanea 

 Say, 1 inch (Nova Scotia to Cape Cod, 

 Massachusetts), p. 376. 



t. NORTHERN CARDITA, Venericardia 

 borealis Conrad, 1 inch (Labrador to 

 North Carolina), p. 379. 



u. GLASSY LYONSIA, Lyonsia hyalina Con- 

 rad, lA inch (Nova Scotia to South Ca- 

 rolina), p. 468. 



V. LEA'S SPOON-CLAM, Feriploma leanum 

 Conrad, 1 inch (Nova Scotia to North 

 Carolina), p. 474. 



\v. PAPER SPOON C:LAM, Periploma papyra- 

 tium Say, 1 inch (Labrador to Rhode 

 Island), p. 472. 



X. UNEQUAL SPOON CLAM, Periploma 

 inequale C. B. Adams, 1 inch (South 

 Carolina to Texas), p. 473. 



y. CONRAD'S THRACIA, Thracia conradi 

 Couthouy, 3 inches (Nova Scotia to 

 New York), p. 471. 



