Pleistocene Soricidae from San Josecito Cave, Nuevo Leon, Mexico

One right ramus, bearing all three molars but lacking the other teeth and the tip of the coronoid process, needs close comparison only with certain of the smaller North American species of Sorex. From S. merriami of southeastern Wyoming, it differs in having a shorter, much shallower dentary, a shorter molar row, and a lower coronoid. In every particular it is identical with Sorex cinereus. Sorex cinereus from northern British Columbia and the specimen from Nuevo León differ from Sorex saussurei, S. obscurus, and S. vagrans in the ratio of the height of the coronoid to the length of the dentary.