TENNESSEE: _Chester_: South Fork, Forked Deer River just E Henderson (Endsley, 1954:40). _Clay_: Mill Creek, 3 mi. from Butler's Landing; Obey River above mouth of Wolf River at Lilydale; mouth of Wolf River (Shoup, Peyton and Gentry, 1941:75); Iron Creek "near" Willow Grove (Stejneger, 1944:56). _Fentress_: _Jackson_: (Gentry, 1941:332). _Lake_: Reelfoot Lake (Parker, 1948:29). _Obion_: Walnut Log (Parker, 1937:85); east shore of Reelfoot Lake, Samburg (Rhoads, 1895:386). _Overton_: Medlock Branch, tributary of West Fork Obey River north of Allred (Shoup, Peyton and Gentry, _loc. cit._). _Roane_: 2 mi. S Kingston (Stejneger, 1944:55). VERMONT: _Chittenden_: Lake Champlain, mouth of Winooski River; "near" Burlington; Milton (= Minton) (Babcock, 1919:420). _Franklin_: Swanton (Stejneger, 1944:55). WEST VIRGINIA: _Randolph_: Tygart River at Elkins (Green, 1937:116). WISCONSIN: _Burnett_: _Crawford_: (Pope and Dickinson, 1928:83). _Dane_: Lake Wingra, Madison (Noland, 1951:54). _Grant_: (Pope and Dickinson, _loc. cit._). _Green Lake_: Berlin (AMNH 6840-41, listed in card file March 2, 1959). _Jefferson_: Lake Mills (Dickinson, 1950:75). _La Crosse_: West Salem (Pope, 1930:281). _Oneida_: _Pepin_: (Pope and Dickinson, _loc. cit._). _Racine_: Eagle Lake (Edgren, 1944:498); Burlington; Rochester (Stille and Edgren, 1948:201). _Sheboygan_: Sheboygan (KKA). _Trempealeau_: _Vernon_: "near" Viroqua (Pope, _loc. cit._). _Walworth_: Lake Beulah (Dickinson, _loc. cit._). _Washburn_: (Pope and Dickinson, _loc. cit._). _Waukesha_: Lac La Belle (Cahn, 1929:8). _Winnebago_: Wolfe River (Dickinson, _loc. cit._). =Trionyx spinifer hartwegi= (Conant and Goin) Western Spiny Softshell Plates 35 and 36 _Amyda spinifera hartwegi_ Conant and Goin, Occas. Papers Mus. Zool. Univ. Mich., No. 510:1, pl. 1, map 1, June 15, 1948. _T[rionyx] s[pinifer] hartwegi_ Schwartz, Charleston Mus. Leaflet, No. 26:11, May, 1956. _Type._--Holotype, UMMZ 95365; alcoholic adult male; obtained at Wichita, Sedgwick County, Kansas, in May, 1945, by Robert Young. _Range._--Central United States in tributaries flowing into the Mississippi River from the west, except the Red River drainage; eastern Montana, North Dakota, and southern Minnesota south to eastern Colorado, northern Oklahoma and Arkansas (see map, Fig. 19). _Diagnosis._--Juvenal pattern of small ocelli, rarely as large as two millimeters in diameter, or usually solid black dots that are not much larger in center of carapace than at sides (mean OD/PL, Kansas, .022); only one dark marginal line separating pale rim of carapace from dorsal ground color. _Description._--Plastral length of smallest hatchling, 2.8 centimeters (USNM 9928); of largest male, 13.1 centimeters (USNM 55687); of largest female, 25.5 centimeters (KU 2283).