  NOTES ON THE VARIATION OF ISCHNOCHITON CONSPICUUS CPR. LAMPSILIS VENTRICOSA COHONGORONTA IN THE POTOMAC RIVER. COLLECTING DAYS ABOUT THE NAVAL STATION, GUANTANAMO BAY, CUBA. AMNICOLIDAE FROM ONEIDA LAKE, N. Y. NEW GENERA AND SPECIES OF CENTRAL AMERICAN NAIADES. ON THE RATE OF GROWTH OF POND UNIOS. A NEW GUNDLACHIA FROM GUATEMALA. A LIST OF SHELLS FROM THE EAST COAST OF FLORIDA. COLLECTING IN DIGBY, NOVA SCOTIA. A NEW TYPE OF THE NAYAD-GENUS FUSCONAIA. GROUP OF F. BARNESIANA LEA. NOTE ON THE RELATION OF SNAIL FAUNA TO FLOODS. Transcriber’s Note: The cover image was created by the transcriber and is placed in the public domain.
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