Land Snails from Northwestern MexicoHenry A. Pilsbry and T. D. A. Cockerell · Proceedings of the Academy of Natural Sciences of Philadelphia · 1925

A Pliocene Fauna from Western EcuadorHenry A. Pilsbry and Axel A. Olsson · Proceedings of the Academy of Natural Sciences of Philadelphia · 1941

Vitrinellidae of the Panamic Province: IIHenry A. Pilsbry and Axel A. Olsson · Proceedings of the Academy of Natural Sciences of Philadelphia · 1952

Patella KermadecensisHenry A. Pilsbry · Proceedings of the Academy of Natural Sciences of Philadelphia · 1894

Report of the Conchological SectionHenry A. Pilsbry · Proceedings of the Academy of Natural Sciences of Philadelphia · 1896

New Australian MollusksHenry A. Pilsbry · Proceedings of the Academy of Natural Sciences of Philadelphia · 1897

New Brazilian StreptaxidæHenry A. Pilsbry · Proceedings of the Academy of Natural Sciences of Philadelphia · 1897

Report of the Conchological SectionHenry A. Pilsbry · Proceedings of the Academy of Natural Sciences of Philadelphia · 1897

The American Camaenidae (Mollusca: Pulmonata)Charles B. Wurtz · Proceedings of the Academy of Natural Sciences of Philadelphia · 1955

On the CondylarthraProfessor Cope · Proceedings of the Academy of Natural Sciences of Philadelphia · 1882

On Uintatherium, Bathmodon and TriisodonE. D. Cope · Proceedings of the Academy of Natural Sciences of Philadelphia · 1882

On Supposed Tertiary AmmonitesJ. S. Newberry · Proceedings of the Academy of Natural Sciences of Philadelphia · 1882

Additions to the Library, 1887Proceedings of the Academy of Natural Sciences of Philadelphia · 1887

Notes on Peruvian TrochilidaeJames Bond · Proceedings of the Academy of Natural Sciences of Philadelphia · 1954

Notes on American MabuyasEmmett Reid Dunn · Proceedings of the Academy of Natural Sciences of Philadelphia · 1935

Fossil Vertebrates from FloridaDr. Leidy · Proceedings of the Academy of Natural Sciences of Philadelphia · 1889