Rana sneres Small Lakes by Tiarza Lake, ?9400', Mono Co. Calif. Sept. 29 Only one adult frog seen, one subadult, and several small ones. Tadpoles abundant. Most of the tadps are on the 50-60 mm size bracket, not by development. A very few tadps were much larger and had well developed hind legs. The smaller tadps will obviously be forced to overwinter as such, and represent this year's food. Are the large tadps stragglers from last year's generation or precocious individuals of this year? The small frogs may probably represent last year's generation. With the exception of two small frogs taken from a pond beside the stream (pool 14.4°C, station 116°), all frogs and tadps were in two lakes. The larger lake is about 200 yd long x 200' wide. The immediate shores of the lake are muddy, since by this date or the season the water has receded some 10' or more from the grocery banks marking the high water level. In a farther-edge situation where tadpoles were congregated, the water temperature was 19.4°C. The smaller lake is about 100' x 60'. This lake probably receives some underground flow from the creek (located on the opposite side of the highway), since the water level showed no evidence of having fallen much through the summer. In a muddy farther-edge where tadpoles frogs found, water temperature 12.2°C