J. O. FLOM,^* R J. BROWNE,^** E. JONES,^*** J. SCHONEWALD<sup>****


*</sup>Naval Biosciences Laboratory, Naval Supply Center, Oakland, California 94625, USA
^**Comparative Pathology Department, Naval Aerospace Medical Research Laboratory, Pensacola, Florida 32512, USA
^***Museum of Vertebrate Zoology, University of California, Berkeley, California 94720, USA
^****California Academy of Sciences, Golden Gate Park, San Francisco, California 94118, USA