seawall, not quite as abundant as yesterday morning, however. Off the seawall there were two streaks of oil on the water; these afforded a barrier between different flocks of birds which were close together. On the bay a number of adult and immature Larus glaucescens and a couple of Larus californicus followed the boat after we got in the western part of the bay. I saw many one young and one adult Larus glaucescens ride a short time on a flagstaff. The former drove the latter from the position. It seems that when a bird gets this position it makes his companions envious. It is often difficult for the bird to alight owing to the vibration, wind, and motion from the sea. Three or four gulls were seen on the water near the mole. Two cormorants and a loon were seen bound northwest. This evening an immature Larus glaucescens followed the steamer until east of Goat Island. At times it would sail along for two or three minutes without moving its wings; at this time it seemed to use its tail as a plane in conjunction with the wings. January 20, 1909. Alameda to San Francisco, bal. Moderate temperature; southeast wind; rainy; 7:30 to 8:30 A.M. While in the backyard this morning two or three