N. Zepf April 29, 1950 Los Angeles County Calif. R.d. mucosa terrain, since for much of the way the channel is isolated and without deep pools. Where the mucosa habitat is best developed, at Luanes Camp, the frog as common. April 26, 1951 East Fork San Gabriel River, 3.0 mi. from Camp Rimmon Some Rana boylii boylii collected here. Water 13.5°C., air 14.6°C. Cloudy with intermittent sunshine. Frogs were on the bank and in water at the edge of the stream and came out onto rocks to sun. East Fork San Gabriel River, at Cattle Canyon Rana boylii boylii on a rock - BT 16.9°C., rock surface 17.0°C., air 15°C. Another in the stream. North Fork San Gabriel River, 3.7 mi. from Camp Rimmon Three Rana boylii boylii were collected here. This is the same spot where R.d.