Paratypes.—Nos. 59884 and 59885, Colorado River south of city limits of Robert Lee, Coke County, Texas; Donald W. Tinkle and Don L. McGregor; October 8, 1960.
Natrix rigida sinicola Huheey, Copeia, 1959(4):305, fig. 1, December 30, 1959.
Paratype.—No. 24500, Steep Hill Creek, Natchitoches Parish, Louisiana; Henry S. Fitch; August 15, 1947.
Ninia cerroensis Taylor, Univ. Kansas Sci. Bull., 36:699, figs. 5-6, July 15, 1954.
Holotype.—No. 31935, Pacific slope of Cerro de la Muerte, 7500 feet, San José Province, Costa Rica; Edward H. Taylor; July 8, 1952.
Nothopsis torresi Taylor, Univ. Kansas Sci. Bull., 34:31, pl. 1, October 1, 1951.
Holotype.—No. 25719, Morehouse Finca, 5 miles southwest of Turrialba, Cartago Province, Costa Rica; Edward H. Taylor; July 16, 1947.
Note.—Taylor (1951:31) erroneously listed the number of the holotype as 28719.
Pliocercus annellatus Taylor, Univ. Kansas Sci. Bull., 34:107, pl. 10, fig. 4, October 1, 1951.
Holotype.—No. 25730, Morehouse Finca, 5 miles southwest of Turrialba, Cartago Province, Costa Rica; Edward H. Taylor; July 11, 1947.