many. One bold young Larus glauciscens was sitting on the lower deck of our steamer before we left the slips. On the way over both of the above species acted in their usual manner. On the San Francisco side of the bay I noted several Larus philadelphia working about to the southward of the ferry route. Their flight is more irregular than that of Larus californicus and resembles somewhat that of Chrous stolidus (which, however, is not as irregular as that of Sterna). Two large flocks of birds were seen flying southward in long lines, which kept changing in shape. They were very high in the air and I think were probably curlew. Another flock of about twenty-five were observed flying close to the water. Along the mole half a dozen or so scoters were seen and one bird just outside of the mole which looked like an Aechmophorus occidentalis. There was a small flock of sandpipers and a good-sized flock of gulls near the roundhouse.