Hooper, 1936 Berkeley, Alameda Co., Calif. June 15, + Complete Skel. ♂ 543 Musotela f. The above specimen was collected by Mr. Cres. Wilson (of 2147 Russell St., Berkeley) on June 14, 1936, at ¼ mi. N Milpitas, Santa Clara Co. Acc. 4991 June 26, 544? Perognathus c. Californicus 200-109-24-13 The above specimen was collected on Mt. Disblos on Mar. 22; locality & collection same as for # 190 E.T.H. It was kept in captivity until June 26, when it was killed. 545♂ Reithrodontomys naviventris ♂♀-17-18-15 Collected Feb. 2, 1936, in Melrose Marsh, Alameda Co., by Jack C. von Bloeker, Jr. They were kept in captivity until killed on June 26.