SOUTH CAROLINA: _Aiken_: Savannah River, 10 mi. SW Jackson. _Allendale_: Savannah River, Fennell Hill, 2 mi. S US 301. _Anderson_: Pendleton. _Bamberg_: South Edisto River, Cannon's Bridge, 5 mi. from Bamberg. _Berkeley_: 2.5 mi. W Pinopolis. _Charleston_: Charleston. _Clarendon_: Upper Lake Marion at US 301; Lake Marion, 13 mi. SW Manning; 3.3 mi. S Jordan; 6.3 mi. S Jordan; Wyboo Creek, 8.5 mi. from Manning. _Colleton_: Edisto River (Schwartz, 1956:19-20). _Darlington_: Pee Dee River, Society Hill (Stejneger, 1944:72). _Dorchester_: Edisto River, 17 mi. from Summerville; Edisto River, 14 mi. W Summerville; Edisto River, 2.5 mi. S Hart's Bluff. _Fairfield_: 1 mi. N Peak, Newberry County. _Georgetown_: North Santee River, 1 mi. above US 17. _McCormick_: Little River near McCormick; Little River, 3 mi. NE Mt. Carmel. _Laurens_: Enoree River, 3 mi. S Cashville, Spartanburg County; Enoree River, 9.4 mi. N Clinton. _Orangeburg_: Edisto River, Orangeburg. _Saluda_: Batesburg; Lake Murray; Little Saluda River; 5 mi. from Saluda. _County unknown_: Upper Lake Santee (Schwartz, _loc. cit._). =Trionyx spinifer emoryi= (Agassiz) Texas Spiny Softshell Plates 43, 44 _Aspidonectes emoryi_ Agassiz (in part), Contr. Nat. Hist. United States, Vol. 1, Pt. 2, p. 407; Vol. 2, Pt. 3, pl. 6, figs. 4-5, 1857. _T[rionyx] s[pinifer] emoryi_ Schwartz, Charleston Mus. Leaflet, No. 26, p. 11, 1956. _Type._--Lectotype, USNM 7855; alcoholic (sex undetermined); obtained from the Río Grande near Brownsville, Texas, in the course of the Mexican Boundary Survey under the command of Colonel Wm. H. Emory. _Range._--Southwestern United States and northern México; the Río Grande drainage in Texas, New Mexico and northern México; the Río San Fernando and Río Purificación drainages in northeastern México; the Colorado River drainage in Arizona, New Mexico, and southern Nevada (see map, Fig. 19). _Diagnosis._--Juvenal pattern of white dots, not encircled with dusky or blackish ocelli, confined to posterior third of carapace; pale rim of carapace conspicuously widened, four to five times wider posteriorly than laterally; a dark triangle in front of eyes, base line connecting anterior margins of orbits; pale postocular stripe interrupted leaving conspicuous pale, usually dark-bordered, blotch just behind eye. _Description._--Plastral length of smallest hatchling, 2.5 centimeters (USNM 7632); of largest male, 13.0 centimeters (KU 2914, 3125, 3150); of largest female, 22.0 centimeters (TNHC 8023, 8104). Carapace pale brownish or tan, lacking whitish dots on anterior half; whitish dots confined to posterior third of carapace, sometimes lacking posteriorly, especially on juveniles; small, blackish dots rarely occurring on surface of carapace, usually confined to margins when present; pale rim of carapace four to five times wider posteriorly than laterally.