1911. Herpetology of Missouri. Trans. Acad. Sci. St. Louis, 20(5):59-274, 7 pls., July 28. HURTER, J., and STRECKER, J. K. 1909. Amphibians and reptiles of Arkansas. Trans. Acad. Sci. St. Louis, 18(2):11-27, May 14. JOHNSON, C. W. 1894. Trionyches in the Delaware drainage. Amer. Nat., 28:889, October. KARLSTROM, E. L. 1957. The use of CO^{60} as a tag for recovering amphibians in the field. Ecology, 38(2):187-195, 6 figs., 1 table, April. KELLOGG, R. 1929. The habits and economic importance of alligators. U. S. Dep't. Agric., Tech. Bull. 147:1-36, December. KNEPTON, J. C., JR. 1956. County records of Testudinata collected in Georgia. Jour. Tennessee Acad. Sci., 31(4):322-24, October. LACÉPÈDE, B. G. E. 1788. Histoire naturelle des quadrupèdes ovipares et des serpens. Volume I. Paris, 17 pp., 1 folding table, 651 pp., 1 folding table, 41 pls. LAGLER, K. F. 1943. Food habits and economic relations of the turtles of Michigan with special reference to fish management. Amer. Midl. Nat., 29(2): 257-312, 9 figs., 9 tables, March. 1943a. Methods of collecting fresh-water turtles. Copeia, 1943(1):21-25 1 fig., March 31. 1954. Michigan turtles. Reprint from Michigan Conserv., 23(3):no page numbers, May-June. LANE, H. H. 1910. A paired entoplastron in _Trionyx_ and its significance. Proc. Indiana Acad. Sci., 1909, pp. 345-50. LEGLER, J. M. 1955. Observations on the sexual behavior of captive turtles. Lloydia, 18(2):95-99, June. LESUEUR, C. A. 1827. Note sur deux especes de tortues du genre _Trionyx_ Gffr. St. H. Mém. Mus. Hist. Nat. Paris, 15:257-68, 2 pls. LINSDALE, J. M. 1927. Amphibians and reptiles of Doniphan County, Kansas. Copeia, 1927(164):75-81, July-September. 1940. Amphibians and reptiles in Nevada. Proc. Amer. Acad. Arts Sci., 73(8): 197-257, 29 figs., May. LINSDALE, J. M., and GRESSITT, J. L. 1937. Soft-shelled turtles in the Colorado River basin. Copeia, 1937 (4):222-225, 3 figs., December 31. LITTLE, E. L., and KELLER, J. G. 1937. Amphibians and reptiles of the Jornada Experimental Range, New Mexico. Copeia, 1937(4):216-22, December 31. LÖDING, H. P. 1922. A preliminary catalogue of Alabama amphibians and reptiles. Geol. Surv. Alabama, Alabama Mus. Nat. Hist., No. 5:1-59 pp., September. LOGIER, E. B. S., and TONER, G. C. 1955. Check-list of the amphibians and reptiles of Canada and Alaska. Contr. Roy. Ontario Mus. Zool. Palaeont., No. 41:v + 88 pp., 77 maps, August 31. LOVERIDGE, A., and WILLIAMS, E. E.