Zweifel Rana boylii boylii 2600' 1.8mi NE De Salla, A Butte Co., Calif. Oct. 11, 1952 Stream 11°C, 6-10' wide, 6" deep. Lured Rana seen at stream edge and out in the riffles. Relatively low gradient stream, few big rock - average size perhaps 10". Stream is on sedimentary bedrock with sand accumulation in quieter places. Air 1" above stream border 15.6°C. 9:30 - 10:00 AM. Hemlock cedar, alder, white fir, big-leaf maple, Douglas-fir, yellow pine, sugar pine, toa oak, black oak I caught 6 of the frogs seen. Stillmore took