J. Memmler 1943 Perognathus californicus June 7, Mus Vert Zool., Berkeley, Alameda Co., Calif. I removed the green juicy seeds and gave them to the mice. They picked them up from the bottom of the box and ate them with great relish. One or two grains were even stored in the cheek pouches by one of the mice. I then went to Brock's Bird Store on Shattuck Avenue and bought some dry field seeds @ 10¢ a pound. When I gave the mice some of these they also ate them. They cracked the outer shell with the teeth. They may have stored some of these in their pouches also. Later I saw them clearing out their pouches. They pull them all the way out with a stroking motion against the lower jaw from posterior to anterior using one hand on each side of the jaw. When I took them home last night I used the same small box with a small bottle of hot water to help keep them warm. At home they ate more seeds* and drank a little milk. They were with June 8, me again last night in bed. This morning they drank a little milk and ate a few seeds. Yesterday both eyes of one were open. The others eyes are still * See June 14 for method