238, 239, 241, 285-291. 1952: 20, 21, 47, 50-52, 55, R. Zweifel '226 Rana sierrae Springer trout ranch, 4000', Calaveras Co. Calif. _Oct. 4_ Small frogs, some with tail incompletely resorbed, very abundant. Also many large tadpoles. Large frogs including a gravid ? and taken. Temperature records - small stream 12.1° (gravid frog found); trout pool 10.5° (ad. ?); stream at lake outlet 16.4° (ad ?); stream on meadow 15.6° (small frogs & tadpoles). The woman whose husband owns the trout farming premises informed me that the snow pack lasts usually from the end of November until May, and is around 6' deep, though two years ago a depth of 11' was reached. Hatching eggs were collected here on May 10 of this year, so it is evident that development may be completed in one season.