Fig. 1. General habitat of T. s. pallidus and T. m. muticus, Lake Texoma, in a period of low water, 2 mi. E Willis, Marshall County, Oklahoma, February 24, 1951.
Fig. 2. Type locality of T. ater, Tío Candido, 16 km. S Cuatro Ciénegas, Coahuila, México, July 30, 1959. An adult male of T. s. emoryi was also netted here.
PLATE 50
Fig. 1. General habitat of T. s. asper and T. m. calvatus, Escambia River, 2 mi. E, 1/2 mi. N Century, Escambia County, Florida, June 1, 1954. Three nests of calvatus found on sand bar in foreground.
Fig. 2. Nest site of T. m. calvatus (excavated by investigator) on open sand bar shown above in Fig. 1, June 1, 1954. Note tracks of turtle in foreground leading toward and away from disturbed area at left.