Oklahoma: Atoka: OU 8966, Rock Creek, 10 mi. E Atoka; OU 8978, McGee Creek, 7 mi. SW Daisy. Caddo: ANSP 100, Washita River, Fort Cobb. [528] Choctaw: OU 27126, Mayhew Creek, 2 mi. NW Boswell. Comanche: OU 4130, 4266, 5390, 8333, 12953, 19986, Wichita Mountains Wildlife Refuge. Jackson: OU 13012, 6 mi. E El Dorado. Kiowa: CNHM 15474. Le Flore: OU 6791, Kiamichi River, 8 mi. W Arkansas State Line. McCurtain: OU 2149-50, 2152, 2155, 17126-28, 17185, 2 mi. SW Smithville; USNM 70397, Red River. Marshall: KU 40175-76, 50830-31, 50847, OU 27290, 27297, 27562-63, TU 16076 (5), 16175 (6), 16662 (5), Lake Texoma, 2 mi. E Willis; KU 50832, mouth of Caney Creek, 4 mi. SW Kingston. Pushmataha: OU 2151, 2157; OU 11365, Buffalo Creek, 5 mi. NW Tuskahoma.

Texas: Archer: TU 16174, 16668-69, Lake Diversion. Bell: SM 5667-69, Nolan Creek. Bosque: KU 47121, 7 mi. below Whitney Dam, Brazos River. Brazos: BCB 4436, 10 mi. E College Station; BCB 4437, 17 mi. S College Station; BCB 4438, 4 mi. N Bryan; KU 50833, 4 mi. W College Station; SM 2556, TCWC 472, Wickson Lake; TCWC 539, Little Brazos River; TCWC 4692, 8 mi. NE Bryan; TCWC 5121, 2 mi. S College Station; TCWC no number. Clay: TCWC 7258, 8 mi. NW Ringgold, Montague County; TU 16667.1, 3 mi. W Byers. Dallas: MCZ 3987, "near" Dallas; ANSP 13243, Dallas. Donley: ANSP 13440, S of Clarendon. Eastland: KU 3132, Cisco. Galveston: TCWC 7251, Alta Loma. Harris: UMMZ 92753, Little Cypress Creek, 1 mi. N Westfield; USNM 94335-36, "near" Houston. Harrison: USNM 95386, 16.5 mi. SE Caddo Lake. Hill: TU 14169, Richland Creek, 0.7 mi. W Mertens. Leon: CNHM 46290, 5 mi. W Marquez; TCWC 8994, 8996, 6 mi. NW Normangee. Liberty: TU 14402, 14417, Trinity River, "near" jct. with Big Creek. McLennan: BCB 4665-66, 6 mi. NNE McGregor; SM no number, 2037, 2452, 2552, 2558, 2560, 2640, 5263, 6533, Lake Waco; SM 0185, Middle Bosque River; SM 2104, 6732, Upper Bosque River; SM 5072, Bull Hide Creek; UI 2399, 1.5 mi. W China Springs; UMMZ 64063, Waco; USNM 55601. Madison: TCWC 471, 517, Twin Lakes. Montgomery: TCWC 540, 3 mi. S Conroe. Nacogdoches: TNHC 14112, Legg Creek, 5 mi. S Douglass. Orange: UMMZ 117060, 3 mi. S Orange; USNM 94456-57, Orange. Randall: TTC 576, Palo Duro Canyon, 15 mi. SE Canyon. Shackelford: TU 14547, Clear Fork Brazos River, Fort Griffin State Park. Somervell: TCWC 8995, TU 14559 (4), Brazos River, 5-6 mi. E Glen Rose. Trinity: SM 2889, Groveton. Walker: TNHC 20829, 5 mi. E New Waverly. Waller: TNHC 14068, 2.7 mi. E Brazos River on US 90. Williamson: MCZ 1627 (2); TU 14348, San Gabriel River, 6.5 mi. E Georgetown. County unknown: ANSP 13448, Wichita River; USNM 7640, Brazos River.

Records in the literature.—Louisiana: Cameron: Sabine Refuge (Cagle and Chaney, 1950:386).

Oklahoma: Le Flore: 6 mi. W Page. McCurtain: 14 mi. SE Broken Bow (Trowbridge, 1937:301).

Texas: Bosque: Bosque River, "near" Valley Mills (Strecker, 1928:6). Harris: Addicks (Brown, 1950:250). Henderson: Cedar Creek (Strecker, 1926a:7). Jefferson: 12 mi. SW Port Arthur (Guidry, 1953:56). Liberty: Daisetta (Brown, loc. cit.); San Jacinto River (Strecker, 1915:15). McLennan: "near" Crawford (Brown, loc. cit.). Orange: 1 mi. N Bridge City (Guidry, loc. cit.). Tarrant: Trinity River, Fort Worth (Stejneger, 1944:66). Taylor: Abilene (KKA). Tyler: Colmisneil (Siebenrock, 1909:603). Walker: 6 mi. E Huntsville (TCWC 329, listed in card file). Wheeler: 5 mi. N Wheeler (Brown, loc cit.).

Trionyx ater Webb and Legler
Black Softshell

Trionyx ater Webb and Legler, Univ. Kansas Sci. Bull., 40:21, pls. 1 and 2, 1960, April 20.

Type.—Holotype, KU 46903, alcoholic female; obtained 16 km. S Cuatro Ciénegas, Coahuila, México, by John M. Legler (and party), September 6, 1958.

[529]

Range.—Basin of Cuatro Ciénegas, central Coahuila, Mexico (see map, [Fig. 22]).