Quest 1948 Journal 52 May 6 Bahia Concepcion 13 mi SE Mulege Baja California and one Peromyscus eremicus. Traps were set beneath or near large bushes. Birds seen so far today are 1 Pelican, 5 or 6 Frigate Birds, 2 Leaulls, and several Ospreys. The Frigate Birds were feeding together about 1/2 mile offshore. May 7 Minimum last night was 71°, maximum Today was 92° F. 49 live traps baited with bird seed and set last night in sandy area in back of beach N.E. of camp caught 1 ? Dipodomys merriami, 1 ? Perognathus baylei, 2 ? 1? Perognathus spinatus, and 1 ? 2 ? Perognathus arenarius. Traps were set among large "Mangle Dulce" and Creosote bushes in association with Cardone, Cholla, Pitaya, Palo Verde, Mesquite, and Elephantaphrium. The yield was low last night possibly because of a herd of cattle that unexpectedly bedded down there. One part of the sandy area is a dried salt marsh, and sand and salt marsh are board- ered by talus (lava + conglomerate rock) and alluvial material. Above rise rocky hills with mesquite and numerous small ceves. S.W. of our camp is a estero bordered by mangroves and a salt marsh. Clams