_=Records in the Literature.=_--USNM 113228, referred to above as _Trionyx m. muticus_ is listed by Stejneger (1944:56) as _Amyda s. spinifera_; four of the specimens listed above (USNM 7655, 92605, 95133-34) are recorded by Stejneger (_op. cit._:23-34) as _Amyda mutica_. Cook (1946:185) records seven specimens of the _muticus_ group from Mississippi as follows: 1, no data; 1, Vicksburg, Warren Co.; 3, Forrest Co.; 1, Crawford Bridge, Jones Co.; 1, Lake Park, Columbus, Lowndes Co. I have not seen these specimens; they are plotted on the distribution map--the one from Vicksburg as _muticus_ and the others as _calvatus_ on geographic grounds. The hatchlings of _Trionyx muticus_ referred to by Anderson (_loc. cit._) include the nine paratypes from Varnado, Louisiana. [Illustration: PLATE 13 _Trionyx muticus calvatus_ new subspecies, hatchling, UI 31071, holotype (x 1.3). Top, dorsal view. Bottom, ventral view, Photographs by John M. Legler.] [Illustration: PLATE 14 _Trionyx muticus calvatus_ new subspecies, hatchling male, TU 17301, paratype (x 1.3). Top, dorsal view. Bottom, lateral view of left side. Photographs by Isabelle Hunt Conant.] LITERATURE CITED ANDERSON, P. K. 1958. The photic responses and water-approach behavior of hatchling turtles. Copeia, 1958, 3:211-215, 5 figs., August 28. AGASSIZ, L. 1857. Contributions to the natural history of the United States. Vol. II, Part III. Embryology of the turtle. Little, Brown and Co., Boston, pp. 451-643, 27 pls. CAHN, A. 1937. The turtles of Illinois. Illinois Biol. Monogr., 16(1-2):1-218, 31 pls., 15 figs., 20 maps, August 31. CONANT, R. 1938. The reptiles of Ohio. Amer. Midl. Nat., 20(1):1-200, 26 pls., 38 maps, July. 1958. A field guide to reptiles and amphibians of eastern North America. Houghton Mifflin Co., Boston, pp. vii+366, 40 pls., 62 figs., 248 maps. CONANT, R., and C. J. GOIN. 1948. A new subspecies of soft-shelled turtle from the central United States, with comments on the application of the name _Amyda_. Occas. Pap. Mus. Zool., Univ. Michigan, 510:1-19, 2 pls., 1 map, June 15. COOK, F. A. 1946. Distribution of species of Amyda in Mississippi. Journ. Mississippi Acad. Sci., 1941-1947:185-190. SMITH, H. M. 1950. Handbook of amphibians and reptiles of Kansas. Univ. Kansas Mus. Nat. Hist., Misc. Publ., 2:1-336, 233 figs., September 12. STEJNEGER, L. 1944. Notes on the American soft-shell turtles with special reference to _Amyda Agassizii_. Bull. Mus. Comp. Zool., 94(1):1-75, 30 pls. TINKLE, D. W. 1958. The systematics and ecology of the _Sternothaerus carinatus_ complex (Testudinata, Chelydridae). Tulane Stud. Zool., 6(1):1-56, 57 figs. YARROW, H. C.