Pearson 1949 44 Tilden Park, Contra Costa Co., Calif. Feb. 29 Put 49 Sherman batted with oatmeal at 2 p.m. in Tilden Park on slope across from Brazilein Room. Left for Mistura, same place as Jan. 2. Not as many good runways as before. Great numbers of small depressions scooped out (by skunks?). Saw jockrabbit. Jan 30 at 8 a.m. traps held 1 Microtus, 5 Peromyscus maniculatus (2 of them dead). Compare with catch Jan. 3 with 20 mice including 6 Reithro. Night clear, cool. Saw 1 jockrabbit and a skunk, apparently feeding, in sunshine at 9 a.m. Subway Cave, Shasta Co., Calif. Feb. 3, 1949 Feb. 2 Left Berkeley 11 p.m. with Benson, Mary Koford, and Bob Lewis. Arrived Berryey 5 a.m. and went to the cave east of Cassel on 6-mile Hill. Went down by rope ladder. Not very extensive (about size of 3 branch of subway), but smaller bore. Only 1 bat, 2 Corythomys. Temp. in cave 11°C. Temp. outside at 8 a.m. -9°C. Then went to the small cave 1. mi. N. of Subway Cave. No bats. Temp. near ceiling -4°C. or lower. Then two Parrah Cave 300 yds. SE of Ice Cave. Many Cory. But fewer than on last trip. banded and - unbanded. Flash photo of large cluster and of Mary + Benson. Temp. at first Cory: 35°F. Re-read all boards and left live unbanded cave. a definite tendency for single bats to have ears curled whereas those in clusters have them erect. One bat flew out and headed toward Subway.