LITERATURE CITED 1. Acton, R. T., P. F. Weinheimer, H. K. Dupree, T. F. Russell, M. Wolcott, E. E. Evans, R. E. Schrohenloher and J. C. Bennett. 1971. Isolation and characterization of the immune macroglobulin from the paddlefish, Polyodon Spathula. J. Biol. Chem. 246:6760. 2. Adams, P. B. 1973. A physical adherence column method for the-* preparation of T and B lymphocytes from normal mouse spleen. Cell. Immunol. 8:356. 3., Arabrosius, H. 1966. Beitrage zur Immunobiologie poikilothermer Wirbeltiere IV. Weitere immunologische und immunochemische unter suchungen an Schildkroten. Immunitatsforsch. 130:41. 4. Arabrosius, H., J. Hemmerling, R. Richter, and R. Schimke. 1970. Immunoglobulins and the dynamics of antibody formation in porkilcthermic vertebrates (pisces, urodela, reptilia). In Developmental Aspects of Antibody Formation. J. Sterzl and I. Riha, eds. Academia Publishing House of the Czechoslovak Academy of Sciences, Prague. 5. Andersson, J., 0. Sjoberg and G. Moller. 1972. Induction of immunoglobulin and antibody systhesis in vitro by LPS. Eur. J. Inmuno1. 2:349. 6. Andrew, W. 1965. Comparative Hematology. Grue and Stratton, New York. 7. Avtalion, R. R., A. Wojdani, Z. Malik, R. Shahrabani and M. Duczyminer. 1973. Current Topics in Microbiol, and Immunol. 61:1. 8. Benedict, A. A. and L. W. Pollard. 1972. Three classes of immunoglobulins found in the sea turtle, Chelonia mydas. Folia Microbiol. 17:75. 9. Binz, H. and H. Wigzell. 1975. Shared idiotypic determinants on B and T lymphocytes reactive against the same antigenic deter minants. J. Exp. Med. 142:197. 10.Bisset, K. A. 1948. The effect of temperature upon antibody pro duction in cold-blooded vertebrates. J. Path. Bact. 60:87. 153