[Honolulu]: Pacific Science Association, 1939. Pamphlet. pp.783-793, 6x9 inches, offprint pamphlet, a pencilled note states 1944, most probably an accession date, two line maps, rust around the staples, item opens rather stiffly, a good-only copy. Cover leaf bears a rubber-stamped "With compliments of Author."
Underwater riverine troughs in the underwater valley that is SF Bay; Louderback's mollusk-tracing of shell fragments makes for absorbing reading, however sedimental.