Murray 1948 Journal June 18 San Jorge, 25° 44' N, 112° 07' W, Baja Calif. of the dry brush or on the barrier further south. Most were in areas washed by the high tides and perpetually muddy. June 19 Same location Caught 2♂ Perognathus baileyi, 5♀, 3♂ Perognathus arenarius, 2♂, 4♀ Peromyscus maniculatus All Perognathus were taken in dry sand, most by the dulce mangroves just back of the washed flat. The maniculatus were along the edge of mangroves or the salicornia just behind them, in places which had been wet by the tide. Many of the snap traps had been sprung by crabs which usually left claws, and the live traps held about a dozen. Although many traps were soaked and the surface quite muddy, the mice were almost all perfectly dry. Saw several Caspian terns fishing out over the estero. The reddish egrets are quite common. This evening set 50 live traps and 50 museum specials. The former were across the hillside back of camp in sand and the aforementioned brush. The others were divided between the edge of the broad mangrove swamp nearby, and