V. Memmled 1943 Perognathus californicus June 6, Santiago Springs, 2100 ft., 8 mi. E & 1/2 mi. S Simmler, Sh. D Co., Calif. neither of the ?'s had embryos. There were Peromyscus maniculatus caught this time also. The adult ? caught yesterday was kept alive because she had milk. The young were put with her in the hope that she would adopt them and let them feed. She however seemed to ignore them completely. The infants survived the night and also the journey home today. I carried them in a small box 4 1/2 x 3 1/2 x 1/2 with cardboard a wrapping cotton lining and perforations in the lid. We stopped to feed them milk about every two hours along the way. I fed them again at midnight when we got home. I keep them in the same small box at night in my bed. One mouse had one eye open today. June 7, M.V.Z., Berkeley, Alameda Co., Calif. The young P.C.'s were fed milk (Klein) twice at home at 7 and 9 a.m. and then taken to M.V.Z. They ate Klein again at 11 and 12. At 1 o'clock they were not very much interested in milk'. They wandered about the large box I had them in and kept gnashing their teeth. Tom Rogers went out and got some green wild Oats and