Lee Arnold 1937 near Smith Creek Cave, 5,800 ft., Mt. Morich, White Pine Co., Nevada Itinerary Uta stansburiana Coluber taeniatus Pituophis catenifer This region seems to be characterized by the simplicity of number of species of mammals. Peromyscus maniculatus, Dipodomys and Neotoma comprise the main mass of mammals. These few species are found in great abundance. They seem to overlap on each others ecologic niche. For instance Neotoma are caught in the low country where Dipodomys ere to be expected while Dipodomys are also caught on the rocky side hills where Neotoma are found. The Neotoma seem to run around under the low bushes on the flat yards away from any nests or sheltering rocks. The abundance of partly grown Neotoma is significant.