by low vegetation. There were many lava rock boulders in the dry stream bed over which water in the wet season had tumbled in its steep downward course. It was from under one of these lava rocks that I flitshed a small bat. I saw it fly under another rock and succeeded in killing it with my shot pistol. It proved to be Monophylla No. 12265. Farther down the ravine I saw two more small bats but they [illegible] from me. It was near there that George found his two four-toed Anteaters in a hollow tree about three and one-half feet from the ground. December 5, 1927 - I found a large species of Peromyscus in my traps today. Nos. 12268 to 12271 inclusive were added to our collection. These specimens were caught in a dense shaded and deep ravine where I found the soil to be cool and moist under the heavy vegetation. On either side of the water course, now dry, were lava rock ledges. It was under these ledges that the Peromyscus were taken. On one side of this ravine was virgin jungle while on the other was young coffee. Nos. 12272 to 12275 inclusive were caught in the young coffee. The traps were set