1938. Field guide to New England turtles. New England Mus. Nat. Hist., Nat. Hist. Guides, 2:1-56, 9 pls., November. BARBOUR, T., and LOVERIDGE, A. 1929. T ypical reptiles and amphibians. Bull. Mus. Comp. Zool., 69(10): 205-360, June. BARTRAM, W. 1791. Travels through North and South Carolina, Georgia, east and west Florida, the Cherokee country, the extensive territories of the Muscogulges, or Creek Confederacy, and the country of the Chactaws; containing an account of the soil and natural productions of those regions, together with observations on the manners of the Indians. First Edition, Philadelphia, xxxiv+522 pp., 8 pls. (including frontispiece), 1 map. Plates unnumbered except "Plate IV" (dorsal view of head of softshell), inserted between pages 282 and 283. BAUR, G. 1887. Über die stellung der Trionychidae zu den übrigen Testudinata. Zool. Anz., 10(242):96-102, January 17. 1888. Notes on the American Trionychidae. Amer. Nat., 22(264):1121-22, December. 1891. On the relations of Carettochelys Ramsay. Amer. Nat., 25:631-639, 3 pls., July. 1893. Notes on the classification and taxonomy of the Testudinata. III. The genera of the Trionychidae. Proc. Amer. Phil. Soc., 31:213-221, May 5. BERGOUNIOUX, M. F.-M. 1932. Sur la place des _Trionyx_ dans la classification des chéloniens. Compt. Rend. Acad. Sci., 195(26):1407-09, December 27. 1936. Sur l'origine du groupe des Trionychoidés. Compt. Rend. Acad. Sci., 203(21):1087-88, November 23. 1937. Chéloniens fossiles du Kiméridgien du Cap de la Hève. Bull. Soc. Nat. Hist. de Toulouse, 71(1-2):180-91, 2 figs., 2 pls., June 30. 1952. Remarques due les chéloniens fossiles de la famille des Carettochelyidae. Compt. Rend. Acad. Sci., 234(23):2302-04, June 4. BEYER, G. E. 1900. Louisiana herpetology with a check-list of the batrachians and reptiles of the state. Proc. Louisiana Soc. Nat., 1897-1899, pp. 25-46. BISHOP, S. C. 1923. Notes on the herpetology of Albany County, New York, III. Copeia, 1923(125):115-20, December 31. BLAIR, W. F. 1959. Distributional patterns of vertebrates in the southern United States in relation to past and present environments. _In_ Zoogeography, edit. C. L. Hubbs. Amer. Assoc. Adv. Sci., Publ. No. 51, Washington, pp. 433-468, 11 figs., January 16. BLANCHARD, F. N. 1923. The amphibians and reptiles of Dickinson County, Iowa. Univ. Iowa Stud. Nat. Hist., 10:19-26. * BLATCHLEY, W. S.