Collected Papers; Volume 1

Monograph of the Naiades of Pennsylvania . . Volume V 12

Crawfishes of Western Pennsylvania

Papers on Unionidae

Monograph of the Naiades of Pennsylvania . . Volume V 12

Monograph of the Naiades of Pennsylvania

South American Naiades; a Contribution to the Knowledge of the Freshwater Mussels of South America

Grundzüge der Marinen Tiergeographie. Anleitung Zur Untersuchung der Geographischen Verbreitung Mariner Tiere, Mit Besonderer Berücksichtigung der Dekapodenkrebse

South American Naiades

Mutual Affinities of the Species of the Genus Cambarus, and Their Dispersal over the United States

Monograph of the Naiades of Pennsylvania .. Volume V 12