The Foundation photographs in this subseries primarily depict expeditions conducted by Capt. Hancock aboard the Velero III in the 1930s; images of scientific data gathering aboard the Velero IV; and specimen photographs. Many of the images exist in both negative and print formats, and there is duplication in the prints. In addition to mounted Foundation photographs with captions and other identification information [boxes 230-238], there are also smaller format photographs [generally with negative information on the reverse] and "snapshot" photos, taken by John S. Garth and other members of the various expeditions. [See also the John S. Garth papers series for snapshots taken by Garth during some of these expeditions.] Of particular interest are the many photographs taken during the 1936 and 1937 expeditions to the Galapagos Islands, Mexico, and South America.