1957. Yolk retraction as a possible cause of kyphosis in turtles.

Herpetologica, 13(Pt. 3):236, October 31.

WOOD, L. W.

1959. New Ohio county records in the herpetology collection of the Cleveland Museum of Natural History. Jour. Ohio Herp. Soc., 2(2):8, September.

WRIGHT, A. H.

1919. The turtles and the lizard of Monroe and Wayne counties, New York. Copeia, 1919(66):6-8, February 25.

WRIGHT, A. H., and FUNKHOUSER, W. D.

1915. A biological reconnaissance of the Okefinokee Swamp in Georgia. The reptiles. Proc. Acad. Nat. Sci., Phila., 67:107-92, 14 figs., 3 pls., April 23.

YARROW, H. C.

1882. Check list of North American Reptilia and Batrachia, with catalogue of specimens in the U. S. National Museum. Bull.

U. S. Nat. Mus., 24:vi + 249 pp.

ZANGERL, R.

1939. The h.o.m.ology of the sh.e.l.l elements in turtles. Jour. Morph., 65(3):383-407, 9 figs., 2 pls., November.

_Transmitted June 8, 1961._

[Ill.u.s.tration: PLATE 31

_Trionyx ferox_, juveniles. _Top_--UMMZ 76755 ( 1) dorsal and ventral views; Lake Griffin, Lake County, Florida. _Bottom_--TU 13960 ( 3/4), dorsal and ventral views; Hillsborough River, _ca._ 20 mi. NE Tampa, Hillsborough County, Florida.]

[Ill.u.s.tration: PLATE 32

_Top_--_Trionyx ferox_, female, UMMZ 90010 ( 2/9); east edge Okefinokee Swamp, Charlton County, Georgia. _Bottom_--Left, _Trionyx ferox_, adult male, UMMZ 102276 ( 1/5), 14 mi. SE Punta Gorda, Lee County, Florida; right, _Trionyx sinensis_, female, KU 39417 ( 3/10), 5 mi. ESE Seoul, Korea. All dorsal views; note resemblance of two species in having longitudinal ridging and marginal ridge of carapace.]

[Ill.u.s.tration: PLATE 33

_Trionyx spinifer spinifer_, juveniles, dorsal views.

_Top_--UMMZ 74518 ( 1-2/5); Portage Lake, Washtenaw County, Michigan.

_Bottom_--TU 16132 ( 1-1/5); Sevierville, Sevier County, Tennessee.]

[Ill.u.s.tration: PLATE 34

_Trionyx spinifer spinifer_, dorsal views.

_Top_--Adult male, UMMZ 54401 ( 3/7), Portage Lake, Livingston County, Michigan.

_Bottom_--Female, UMMZ 81699 ( 2/7), Ottawa County, Michigan.]

[Ill.u.s.tration: PLATE 35

_Trionyx spinifer hartwegi_, dorsal views.

_Top_--Juveniles; left, KU 40210 ( 9/10), 12-1/2 mi.

S, 1-1/4 mi. W Meade, Meade County, Kansas; right, KU 16531 ( 1), Smoky Hill River, 3 mi. SW Elkader, Logan County, Kansas.

_Bottom_--Adult Males; left, KU 18385 ( 2/5), Arrington, Comanche County, Kansas; right, KU 3758 ( 3/10), Little Salt Marsh, Stafford County, Kansas.]

[Ill.u.s.tration: PLATE 36

_Trionyx spinifer hartwegi._ _Top_--Juveniles; left, TU 13885, dorsal view ( 3/4), Little Vian Creek, 1 mi. E Vian, Sequoyah County, Oklahoma; right, KU 3732, ventral view ( 5/7), Independence, Montgomery County, Kansas.

_Bottom_--Adult female, TTC 719, dorsal view ( 2/7), 10 mi. S, 2 mi. W Gruver, Hansford County, Texas.]

[Ill.u.s.tration: PLATE 37

_Trionyx spinifer asper_, juveniles, dorsal views.

_Top_--Left, male, KU 50839 ( 9/10), Flint River, 1-1/2 mi. S Bainbridge, Decatur County, Georgia; right, female, TU 15661 ( 9/10), Blackwater River, 4.3 mi. NW Baker, Okaloosa County, Florida.

_Bottom_--Left, male, TU 13623 ( 7/9), Yellow River, 3.1 mi. W Hammond, Tangipahoa Parish, Louisiana; right, female, TU 14362 ( 4/5), Hobolochito Creek, 1 mi. N Picayune, Pearl River County, Mississippi.]

[Ill.u.s.tration: PLATE 38

_Trionyx spinifer asper_, dorsal views.

_Top_--Left, adult male, TU 15869 ( 1/2), Escambia River, 1.2 mi. E Century, Escambia County, Florida; right, female, TU 14673.3 ( 1/2), Black Warrior River, 17-1/2 mi. SSW Tuscaloosa, Tuscaloosa County, Alabama.

_Bottom_--Left, adult male, TU 17117 ( 1/4), Pearl River, Varnado, Washington Parish, Louisiana; right, female, TU 16584 ( 1/5), locality same as TU 15869.]

[Ill.u.s.tration: PLATE 39

_Trionyx spinifer pallidus_, new subspecies, dorsal views.

_Top_--Juveniles; left, TU 481 ( 2/3), Caddo Lake, Caddo Parish, Louisiana; right, KU 50832 ( 9/10), mouth of Caney Creek, 4 mi.

SW Kingston, Marshall County, Oklahoma.

_Bottom_--Adult males; left, holotype, TU 484 ( 1/3), locality same as TU 481; right, TU 1122 ( 2/9), Laca.s.sine Refuge, Cameron Parish, Louisiana.]

[Ill.u.s.tration: PLATE 40

_Trionyx spinifer pallidus_, new subspecies, dorsal views.

_Top_--Females; left, TU 13213 ( 1/4), Sabine River, 8 mi. SW Negreet, Sabine Parish, Louisiana; right, TU 13266 ( 2/9), Sabine River, 8 mi. SW Merryville, Beauregard Parish, Louisiana.

_Bottom_--Left, adult male, SM 2889 ( 1/4), Groveton, Trinity County, Texas; right, female, TU 14402 ( 1/5), Trinity River, near junction with Big Creek, Liberty County, Texas.]

[Ill.u.s.tration: PLATE 41