Idaho Inlet, Chichagoff Island, Alaska. July 20 to 26 1907. MAMMALS. Frank Stephens. I saw a whale in the outer part of the bay as we came in. Odocolleus columbianus sitkensis. Sitka Deer. Not plentiful. I saw a few tracks and Dixon saw one deer on the beach across from camp. Peromyscus sitkensis. Sitka Mouse. Not common. Microtus (sitkensis?) Sitka? Meadow Mouse. A large meadow mouse was common on the islet where we camped, but I caught but one adult. I saw several places where they had burrowed a little under the surface and thrown out some earth. Ursus sp.? Hassalborg saw signs of bears along the salmon creek at the head of the bay. He said they were feeding on the salmon but came out only in the night. The brush was very thick and he was unable to find any. Dixon and I saw a fresh track of a medium sized bear and followed it from near to the summit half way down the mountain. In one place near the summit it had slid down a gravel bank onto a snowbank. This snowbank was so steep that I could hardly walk on it without slipping but the bear tracks showed no signs of slips and probably its foothold was more secure than ours. Sorex sp.? I caught several small shrews, apparently like those caught at Red Bluff Bay, but with hind feet not as narrow as those of the small sp. taken at Glacier Bay. Most of these were taken the morning that we started to climb the mountain and smiled before we got back. The hair of one taken the morning we left slipped when I started to skin it after breakfast.