vro 



TABUE OF CONTBNXS. 



Introduction, treating of the parts of the 

 Pelecypod : 



I'AGE 



The Valves 486 



The Huige Teeth 490 



The Stemmann Formula 492 



Types of Teeth 492 



The Pholad myophore 496 



The Ligament and Resilium 497 



The Adductor Muscles 503 



The Siphons 503 



The Gills or Branchia 504 



TheHeart 506 



The Nephridia 507 



The Foot 507 



The Prodissoconch 508 



Genera! Classification of the Pelecy- 

 poda ; 



Class Pelecypoda 511 



Order Prionodesmacea 511 



Order Anomalodesmacea 512 



Order Teleodesmacea . 512 



The Paleoconcha 513 



Order Prionodesmacea 515 



Superfamily Solemyacea 515 



Family Solemyidse 515 



A. Taxodonta 515 



Superfamily Nuculacea 515 



Family Ctenodontidas ? 515 



Family Nuculidfe 516 



Family Ledidse 516 



Superfamily Arcacea 516 



Family Macrodontidas 516 



Family Cyrtodontidse 517 



Family Limopsidse 517 



Family Arcidas 517 



B. Schizodonta 51S 



Superfamily Pteriacea 51S 



Family Pterineidae , 518 



Superfamily Pteriacea, conlinued. 



PAGE 



Family Ambonychiidas 51S 



Family Pinnidae 519 



Family Conocardiidas 519 



Family Pernidse 520 



Family Pteriida; 520 



Family Vulsellida; 520 



Superfamily Ostracea 520 



Family Ostreidae 521 



Family Eligmidas 521 



Superfamily Naiadacea 521 



Family Cardiniidse 522 



? Family Megalodontidse 522 



Family Unionidse 522 



Family Mutelidae... 523 



Family Etheriidse 523 



Superfamily Trigoniacea 524 



Family Lyrodesmida; 524 



Family Trigoniidje 524 



O. Isodonta 524 



Superfamily Pectinacea 524 



Family Pectiriidae 525 



Family Spondylidje 525 



Family Dimyidae 526 



Family Limidae 526 



Superfamily Anomiacea 526 



Family Anomiida3 527 



D. Dysodonta 527 



Superfamily Mytilacea 527 



Family Modiolopsidas.. 527 



Family Mytilida; 528 



Family Dreissensiidee 528 



Family Modiolarcidae 52S 



Family Prasinidae? 529 



Order Anomalodesmacea 529 



Superfamily Anatinacea 530 



A. Eusiphonia 530 



Family Ceromyidae 530 



