MUSEUM OF COMPARATIVE ZOOLOGY. 
Arca polycyma Dall. 
Arca glomerula Dall. 
Arca auriculata Lamarck. 
Arca lienosa Say. 
Arca reticulata Chemnitz. 
Arca Adamsi Shuttleworth. 
Arca Noe Linné, var. occidentalis Philippi. 
Arca umbonata Lamarck. 
Arca ectocomata Dall. 
Arca barbata Linné. 
MACRODON Lycett. 
Macrodon asperula Dall. 
Macrodon sagrinata Dall. 
Famiry NUCULIDZ. 
NUCULA Lamarck. 
Nucula egeénsis Forbes. 
Nucula cymella Dall. 
Nucula crenulata A. Adams. 
Nucula crenulata, var. obliterata Dall. 
Nucula Verrillii Dall.* 
Famity LEDID/A. 
LEDA Schumacher. 
Subgenus YOLDIA Morch. 
Yoldia solenoides Dall. 
Yoldia liorhina Dall. 
Subgenus LEDA s. s. 
Leda Carpenteri Dall. 
Leda messanensis Seguenza. 
Leda solidula Smith. 
Leda vitrea D’Orbigny, var. cerata Dall. 
Leda concentrica Say.* 
Leda acuta Conrad. 
Leda solidifacta Dall. 
Leda Verrilliana Dall.* 
191i 
