TABLE OF CONTENTS. 



Superfamily Anatinacea, continued. 



PAGE 



Family Pholadomyidae 530 



Family Anatinidae 531 



Family Periplomidas 531 



Family Thraciid;e 531 



Family Myochamidae 531 



B. Adelosiphonia 532 



Family Pandoridse 532 



Family Lyonsiidze 532 



Family Lyonsiellidae 533 



Family Chamostreidae 533 



Superfamily Ensiphonacea 534 



Family Clavagellidse 534 



Superfamily Poromyacea 534 



Family Euciroidas 535 



Family Verticordiidae 535 



Family Poromyidae 535 



Family Cuspidariidae 536 



Order Teleodesmacea 537 



A. Pantodonta 537 



? Family Allodesmidae 537 



B. Diogenodonta 538 



Superfamily Cypricardiacea 538 



Family Pleurophoridae ? 538 



Superfamily Astartacea .... 5^8 



Family Curtonotid;e ^38 



Family Astartidae 538 



Family Crassatellitidu.- 539 



Superfamily Cyreiiacea 540 



Family Cyrenidce 540 



Family Sphaeriidys 540 



Superfamily Carditacea 540 



Family Carditidas 541 



Superfamily Chamacea 541 



Family Chamidas 541 



Family Monopleuridas 542 



Family Caprinidae 542 



Superfamily Rudistse 543 



Family Radiolitidaa 543 



Family Hippuritidae 543 



Superfamily Lucinacea 543 



Family Tancrediidae 543 



Family Unicardiidae 544 



Family Lucinidau 544 



Family Corbidae ? 544 



Superfamily Lucinacea, continued. 



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Family Diplodoutidre 545 



Family Cyrenellidx 545 



Family Cryptodonticte 546 



Superfamily Leptonacea 546 



Family Leptonidae 546 



Family Galeommidae 547 



Family Chlamydoconchidae 547 



Family Kelliellida? 548 



C. Cyclodouta 548 



Superfamily Cardiacea 548 



Family Cardiidas 548 



Family Adacnidae ? 549 



Superfamily Tridactiacea 549 



Family Tridacnidas 549 



Superfamily Isocardiacea 550 



Family Isocardiidae 550 



Family Callocardiida- 551 



D. Teleodonta 551 



Superfamily Veneracea 551 



Family Veneridae 552 



Family Petricolida? 552 



Family Glaucomyidae 553 



Superfamily Tellinacea 553 



I r amily Tellinida; 553 



Family Semelidae 554 



Family Psammohiid;e 554 



Family Donacid;e 554 



Superfamily Solenacea 555 



Family Solenidae 555 



Superfamily Mactracea 555 



Family Mactridae 556 



Family Cardiliida;? 556 



Family Mesodesmatidre 556 



E Asthenodonta 557 



Superfamily Myacea 557 



F'amily Myacidas 557 



Family Corbulidae 557 



Family Saxicavidae 558 



Family Gastrochaenidae 558 



Superfamily Adestnacea 559 



Family Plioladidae 559 



Family Teredinidae 559 



Notes on Nomenclature 561 



Index to genera 566 



