1935 3 mi. N.E. Vernalis, San Joaquin Co., Calif. August 7, and willow interspersed with a few valley oak and California bay trees offered what seemed to me to be ideal situations; habitats, for wood rats. “Coon,” kit fox, and possibly (?) opossum tracks were seen on the sandy shores of the river proper. If they are here, rodents and other small animals must also be here! Yet not even a white- footed mouse found my traps sufficiently enticing to spring one of them. August 8, Since nothing was in my traps this morning we decided to pick up camp and move on up river to some so-called-by-Olm “virgin land” that was not along the river bottom and had not been flooded by the water. This place is approximately four miles farther north from here, near the Banta-Carbona irrigation canal pumps. After spending two hours hiking, or more exactly tearing our way through brush (which seemed to have been above water) we decided to try for some of the stream beds draining eastward from the Diablo Range.