Coalcomán.
This specimen was reported by Peters (1954:34), who found it beneath a rock at the mouth of a heavily wooded ravine near Coalcomán at an elevation of 950 meters. The only other known specimen is from Comala, Colima, a village, like Coalcomán, that is located near the upper limits of the arid scrub forest.
Natrix valida isabelleae Conant
Natrix valida isabelleae Conant, Nat. Hist. Misc., 126:7, September 15, 1953.—Pie de la Cuesta, Laguna Coyuca, Guerrero, México.
Coahuayana; Playa Azul (2); Punto San Juan de Lima.
Three females and one male have, respectively, 133, 135, 135, and 131 ventrals, and 68, 68, 73, and 75 caudals. The grayish stippling on the posterior ventral surfaces mentioned by Conant (1953:9) is not visible on these specimens. In the small individuals from Punto San Juan de Lima and from Coahuayana there are four longitudinal rows of dark spots on the dorsum; in two large females from Playa Azul the spots are barely discernible.
All of the specimens from Michoacán were found in the coastal lowlands; those from Playa Azul were collected from a small brackish, mangrove-lined lagoon.
Storeria storerioides (Cope)
Tropidoclonium storerioides Cope, Proc. Acad. Nat. Sci. Philadelphia, 17:190, December 26, 1865.—Mexican Plateau. Type locality restricted to Tres Cumbres, Morelos, México, by Smith and Taylor (1950a:336).
Storeria storerioides, Garman, Mem. Mus. Comp. Zool., 8(3):29, June, 1883.