605, Greenville, Washington Co.,
Mississippi; USNM 113228, Jonesville, Catahoula Par.,
Louisiana; USNM 118167, Wheeler Reservoir, Tennessee River,
Alabama.

_=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.