R. Zweifel 1953 Journal July 5 the road, and then within the space of a few hundred yards become a barranca with a depth of 100' or more. The nearly vertical rock walls are brilliantly stained with red and green lichen. The elevation is 5800'. Walnuts, two three kinds of oaks and chihuahua pine are present in the barranca bottom. The surrounding countryside is of gentle, rolling relief with scrubby oak present where not cultivated. There is a large (20' diameter) pothole in the barranca which probably has water in it permanently. No permanent stream was detected in the course of a walk of 1/2 mile down canyon. A frog seen in the pothole was probably Rana pipiens, though positive identification was not made. Bill found a Hyla arenicolor a short distance up canyon from the pothole. Sceloporus jarrovi was abundant in the canyon bottom and on the rocky walls. 49.4 mi. - road joins railroad bed 51.2 mi. - Ojito, Durango. Formerly a station on the railroad, now a couple of dust-encrusted adobes. 62.0 mi. Sceloporus jarrovi seen here. 69.3 mi. La Boquilla 75.2 mi San Francisco del Oro. Note. In order to