May 16, 1907. Alameda to and from San Francisco, Cal. Only noted two or three immature Larus californicus near the Ferry Building this evening. May 17, 1907. Alameda to and from San Francisco, Cal. Conditions: - Moderate temperature; brisk north-westerly wind; clear. In the morning a half a dozen gulls were noted flying along the mole to the eastward. On the way in the evenings were a great many Larus philadelphia (very few black headed ones) on the water and flying. They were chiefly off Goat Island. Some of the immature ones had black on the inner edge of the wings as well as on the tail. Their flight was very graceful. When they arose upon the approach of the ferry boat they flew off a short distance uttering short croak. Two or three Larus Californicus were on the water with them. A few were also seen near the Ferry building; all immature: