Methods Observations were made from the bridge. During a few days when the wind was very calm or coming from our stern, observations were from the flying bridge. From the bridge only about three quarters of the horizon could be observed at any one time and many birds were surely missed because of this. Watch was maintained during nearly all of the diurnal hours that the ship was underway, and occasional checks were made when the ship was stopped on station. Nocturnal observations were made while under way using a light from the Port Boat Deck. No observations were made during the last portion of trip because of the full moon. Time on station was not recorded as observation time even though occasional sightings were made during these periods. Discussion For convenience of analyses the trip has been divided into 8 areas: A - Aug 3-6, B - 7-16 Aug., C - 17-21 Aug., D - 23-28 Aug., E - 29 Aug.-2 Sept., F - 3-8 Sept., G - 9-10, 13-15 Sept., H - 16-18 and 24 Sept. Area A - from San Diego to 20°N was dominated by Leach Storm Petrels and Northern Phalaropes. In the southern part Wedge-tailed Shearwaters, New Zealand Shearwaters, and Cook Petrels also became very important. These areas included many of the coastal bird- fauna as well as some migrant ducks and landbirds. Areas B and F from 20°N to the equator are characterized by a concentration of Pterodroma externa near 5°N. This concentration occurs at the boundary between the North Equatorial counter current and the California coast. Areas C and D from the equator to 10°S are very similar with a few scattered flocks of Sooty Terns in their southern parts. Area E between 2°30'N and S, along 112°W, is the area of Dr. B. A. Taft's current studies. August 29th was spent at the Equator. On the 30th to 31st we went to 2°30'N and back to the Equator, and on September 1 and 2, we went to 2°30'S and back. The only birds of note in this area were the Galapagos Storm Petrels following the ship, which made up nearly one-half of the observations. Area G is the coastal area off Manzanillo Mexico. In this area the predominantly land based sea birds such as boobies, terns, and gulls make up most of the observations. Area H is the final leg northbound from 20°N along the Baja California cost to Guadalupe, and between Guadalupe and San Diego.