Mayhew 1959 April 19 Deep Canyon D.P.S., Riverside Co., Calif. 9 mammals of 3 general Dipodomys sp. (3) Peromyscus (2) sp., and Perognathus sp.(4). after breakfast we hiked east of the gate to the mouth of a small canyon that looked very shallow from a distance. However, it turned out to be a long canyon, most of which was hidden from our campsite. It apparently goes all the way to the valley in which La Quinta is located. We saw Callisamus chaconides, Uta stansburiana and Cnemidophorus tigris in this area, and caught one Crotaphytus collaris. A Dipsosaurus dorsalis was later seen on the alluvial fan below the canyon mouth. Also seen in the canyon were: Verding Tolmie warbler, as well as House finch and Black- throated sparrow. We proceeded south from that canyon and entered another just north of Coyote Canyon. In this site we saw Black-throated grey warblers and a shrike. We also caught 2 Sauromalus obesus and toe-clipped them, then released them. One Lepus californicus was seen on our way back to the cars, which we packed at 1245 (left camp at 0820 that morning). As we drove toward Riverside along