50+ ft., Punta Peñasca, Sonora April 1, 1938, continued. Set out 21 rat-traps in the large rocks; after dark set out 60 mousetraps on rocky-hill (windward side). April 2, 1938 In rat-traps 8 Peromyscus eremicus (5σ; 3♀♂) and no rats; in mousetraps 4 " " (4σ♂) and one Peroqnathus intermedius (σ7108). Put up specimens; recovered four “lost” rat-traps with Dr. Benson who found in the sand near the beach a raccoon skull (5013, 388). Got the truck out of its hole in the sand, loaded it, and went up to the fishing village where we purchased some water (@ 10 centavos/gallon; it is hauled from Sonota), borrowed a fish-line and hooks, and drove around the bay to: 50+ ft., Cerro La Cholla, 6 mi. [illegible] Punta Peñasca, Sonora. Made camp near the beach on a large concrete slab which was (or was to be) the floor of a house. Set out 60 mousetraps and 10 rat traps in the granite hills. April 3, 1938 Caught 2 Peroqnathus intermedius (σ7109, σ7110), 1 Peromyscus eremicus (σ7111), 3 P. eremicus (σ7112, ♀113, and a ♀), and 1 Nestoma lepida (♀116) in the granite-rock hills; a Dipodomys merriami (σ7115) in the crushed granite flats between the rock-hills and the sand. After putting up our catch (Senor Delgadillo helped me) Dr. Benson and I hiked across Cerro La Cholla to the larger bay (Punta Peñasca on far shore) shore where we saw a large sea-lion. That night after dinner we went again across the hills to