LIBRARY •AN 15 1965 TRANSACTIONS unXs'I^y OF THE SAN DIEGO SOCIETY OF NATURAL HISTORY Volume 13, No. 17, pp. 333-368 INVERTEBRATE MEGAFOSSILS OF THE BELVEDERE EXPEDITION TO THE GULF OF CALIFORNIA BY William K. Emerson Chairman, Department of Living Invertebrates American Museum of Natural History, and Research Associate San Diego Natural History Museum AND Leo George Hertlein Curator of Invertebrate Paleontology Department of Geology California Academy of Sciences SAN DIEGO, CALIFORNIA Printed for the Society December 30, 1964
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