R. Zweifel Mar 1, 1952 31 Butte Co. Calif. The Munays, Bill Bremer and I left Berkeley at 10:15 AM and arrived in the vicinity of Chico about 3 1/2 hours later. We drove to De Sable by way of the road which parallels Butte Creek. The canyon has been cut through layers of alternating sandstone and conglomer- ate which outcrop in the form of ledges. There are many springs in these outcrops so that the whole region appears, at least at this season, rather wellwatered. In the digger-pine-blue oak association 10.4 mi. 55W De Sable, we collected Sceloporus occidentalis, 2 Cnemidophorus skeletonatus and observed many Batrachoseps. The lizards were found beneath boards and logs. Just south of the road junction at De Sable, a road heads down into the canyon towards some mines. 1/4 mi. W De Sable, on this road, 4 Rana dr. bayllei were collected (see species account). Hyla were breeding in a pond. Plant associates: Douglas Fir, yellow pine, bay, canyon oak. Mar 2, 1950