Murray 1948 Journal May 4 Bahía Concepción, 13 mi SE Mulegé, Baja Calif. Set out 50 museum special mouse traps on a very rocky hillside. The rocks were dark brown, volcanic, and mostly fairly large. There was ocotillo, copal, creosote and some other thorny bushes, all rather sparse, and a scattering of small plants. crossed two draws which were a little more vegetated. An osprey circled around over the water and we could see several frigate birds flying some distance. At dusk a few tate came by. Dr. Benson shot a Myotis Californiae May 5 Same location In the traps were 7 (4♀, 2♂, 1 discarded) Perognathus spinatus, 4♂, 1♀ Peromyscus eremicus, and 2♂ Neotoma lepida. The Neotoma were both in very large rocks; one was killed and the other still alive but hooked around the neck by the mouse trap. There were noticeably more mice caught in the draws than on the exposed ridges. Dr. Benson shot an oyster catcher We found that in the mouth of the estero there were great quantities of clams, which we gathered and ate.