46. San Francisco to Alameda Mole, bal. conditions:- 5:15 P.M. to 5:35 P.M. Rather overcast; cool; west wind. I saw a few Larus occidentalis and Larus californicus during the trip across. The scarcity of Larus heermanni is noticeable. Aug. 9, 1904. Alameda to San Francisco, bal. conditions:- 7:00 a. m. to 8:00 A. M. Overcast; cool; west wind. I saw a good many Passer domesticus along the route as far as West Alameda Station. Here in the vegetable gardens I noted a few Euphagus cyanocephalus. In the slough on the west side of the track near the roundhouse I saw a few large shore birds. The beach along the mole was lined with gulls;— I dis- tinguished Larus occidentalis. A few large shore birds and two Ardeas herodias in the water, added to the army of birds. On the bay I saw a few Larus occidentalis, Larus cali- ifornicus, and Larus heermanni. San Francisco to Alameda Mole, bal. conditions:- 5:15 P.M. to 5:35 P.M. Overcast; cool; west wind. Larus occidentalis, Larus californicus, and Larus heer- manni occurred quite frequently during the entire trip. The last-named species was particularly abundant. Storendezvous seems to be off Goat Island, although I saw individuals at both ends of the route. On the south side of Goat Island there were a few gulls on the water. A flock of about ten Uria atra flew swiftly by the is- land headed seawards. To the north of Oakland Creek