(Nematognathi) Helogenidae and Pygidiidae, circa 1916-1924

This collection consists of field notes, systematic lists of faunas, summaries, references, and some drawings. The bulk of the material documents work done at Kartabo; chiefly represented are field and anatomical data on more than 400 species of birds, and research and manuscript materials on the fishes of Kartabo. Other subjects include the ecology and invertebrates of Kartabo and amphibians, reptiles, and mammals observed in British Guiana and Venezuela.