EL Karleton 1955 Bufo canorus Aug. 30 Recognized T-35 (RF3 LF2 RH4-) at 1:35 P.M. this ad. -> return 3 times previous. I couldn't locate the Co60 tablet anywhere under skin. Could be up under parotoid gland. Food taken back to Valley for observation and testing with geiger counter when available. Sept. 1 Re-examination of T-35 toad showed parotoid blocking view of Co60 tablet underneath. Tablet well embedded up under left gland. Toad in fine shape from external appearance. Sept. 2 ELK # 818 ad. -> 49.9 mm., LT 4.7 mm. x 3.0 yellow. B.O. (left.) 2.8 mm. x 2.0 mm. RT about same - not preserved. Sept. 6 Barbara Rosenfeld of Berkeley reported canorus localities to me at Yosemite museum. The snow ponds filled with tiny (1/4"+) very black toadsads at Parker Pass, 11,000 ft., Mono Co. Calif. I showed her preserved larvae of similar age and she seemed positive in identification. This locality is the highest breeding site I have recorded. Date was Sept. 3, 1955 which means toads could have bred here at as late as August. Snow patches remained on side slopes above the ponds, very windy lee - a NE facing slope near the site. Might these toad overwinter? Rana (5) On Aug. 28th she observed larger larvae at ponds NE of Toulaley Lake, 10,500 ft. Vogelsong area. Late emergence for these toads.