PANAMIC-PACIFIC PELECYPODA 



NEW GENERA AND SUBGENERA PROPOSED IN THIS WORK 



Family Arcidae Page 



Subgenus Grandiarca of Anadara 93 



Type species, Area grandis Broderip and Sowerby 



Subgenus Sectiarca of Anadara 97 



Type species, Anadara floridana (Conrad) 



Subgenus Caloosarca of Anadara 98 



Type species, Anadara mstica (Tuomey and Holmes) 



Subgenus Esmerarca of Anadara 99 



Type species, Anadara reinharti (Lowe) 



Family Mytilidae 



Genus Perumytilus 116 



Type species, Modiola purpurata Lamarck 



Genus Scolimytilus 118 



Type species. Modiolus (Brachydontes) playasensis Pilsbry 

 and Olsson 



Subgenus Aeidimytilus of Scolimytilus 120 



Type species, Mytilus adamsiana Dunker 



Subgenus Rupiphaga of Lithophaga 138 



Type species, Lithophaga hastasia, new species 



Family Pectinidae 



Subgenus Pacipecteu of Aequipecten - 164 



Type species, Aequipecten tumbezensis (d'Orbigny) 



Family Carditidae 



Subgenus Strophocardia of Cardita 187 



Type species, Cardita megastropha (Gray) 



Subgenus Byssomera of Carditamera 189 



Type species, Cardita af finis Sowei^by 



Family Lucinidae 



Subgenus Lissosphaira of Anodontia 221 



Type species, Anodontia spherica (Dall and Ochsner) 



Family Galeommatidae 



Genus Tryphomyax 240 



Type species, Tryphomyax lepidoformis, new species 



Family Cardiidae 



Subgenus Apiocardia of Trigoniocardia 252 



Type species, Cardium obovale Sowerby 



