Contribution to the biogeography of Cocos Island

Description of a new species of Chlamys (Mollusca: Pelecypoda) from the Galápagos Islands

Descriptions of new species of gastropods from Clipperton Island

Marine mollusks collected during the "Askoy" expedition to Panama, Colombia, and Ecuador in 1941

Marine Pleistocene mollusks from the Galapagos islands

A new Genus of gastropod (Drupinae)

Pectens from the Tertiary of Lower California

Pliocene fossils from Baltra (South Seymour) Island, Galápagos Islands

The Cenozoic Brachiopoda of western North America

The geology and paleontology of the marine Pliocene of San Diego, California