E. L. Karlstam 1954 Critical maximum temps. B. borerz & B. coronus Expt. #3 (cont.) Both A B 7:49 37.2 36.8 34.7 borerz desperately searching, "clowning" at glass, then hard lowered. coronus zone, moving from one end of jar to the other. :51 38.0 37.7 35.0 borerz violent "clowning," rotation coronus rapid movements, climbing side of jar. :53 38.9 38.4 37.0 -coronus flogged on back and did :54 39.2 38.6 not right itself. coronal 38.2°C. :55 40.0 37.6 :57 41.5 38.2 borerz in distress. coronal 38.0°C 39.0 Results Expt. #3: Bulfo coronus and Bulbo borerz lodegildus critical maximum 38-39° C. This large adult B. borerz seemed to respond slower to the critical temperatures than smaller borers used in Expts. 1 & 2. Possibility of size difference in regard to critical point? This toad had been kept in aquarium behind Yosemite Museum for nearly 2 months, and apparently fed well since it still now is in relatively good shape.