These collections were made from July 18 to August 6, 1938. Localities include western Mexico, Clipperton Island, Galápagos Islands, Cocos Island, all in the eastern Pacific, and Old Providence Island, in the Caribbean Sea. Depths range from intertidal to 15 fathoms. Though small, the collection is represented by 17 families, with 31 species, of which 2, Neanthes roosevelti and Polydora tricuspa, are new to science, 1, Cirratulus niger, is newly named, and 2 others, Scalisetosus sp., and Armandia sp., may represent undescribed species. Several others have had their range extended considerably into tropical waters.
Pacific, East Tropical
West Tropical Atlantic