lookout was kept for them. Larus californicus and Larus philadelphia were very common, many feeding together off the ferry slips. An immature Larus californicus was seen with the outer rectrices black and the inner ones white. Most of the Larus californicus were immature birds. One was observed hovering over a flock of twenty or thirty Larus philadelphia which were fluttering over a line of drift near Goat Island where the ocean water met that of the Bay. Two or three adult Larus occidentalis were observed along the water front. A flock of about twenty-five ducks crossed ahead of us when we were SE of Goat Island, and then swung along the south shore of the island. They were at a moderate height. A few sandpipers were observed along the marsh this morning. May 8, 1907.