Sooty Shearwater. Number recorded: 1 One Sooty was recorded, with reliability 0, on 8 August in the northeast corner of the grid. The birds were common outside the grid in this area; this bird represents a straggler from the coastal popu- lation. Cook's Petrel Number recorded: 1 One bird was recorded flying over the oil slick generated by the death Blue Whale at 34°33'想 - 126°29'W in Sector 1 of the Grid. An additional Cook's Petrel was seen one minute after leaving the grid at Point Oak and could be included for all practical purposes. As the concentrations of birds seen on the southern leg of the grid during EGS 10 were flying northwest it is probable that they passed through to the grid area between EGS 10 and EGS 11. Storm Petrels Number recorded: 400 Number collected: 15 W-R birds 178 D-R " 15 Storm Petrels 207 Storm Petrels, all believed to be Oceanodroma leucorhoa comprised 52 percent of the observation during this survey. The presence of dark- rumped forms is not accurately indicated by the 15 birds recorded. As Chandler stated in report on Survey 10, many of the birds recorded as storm petrels were undoubtedly dark rumped birds. These dark rumped birds probably represent birds from the Coronlados or San Benitos of the [illegible] race. The possibility still exists that some of the dark- ruumped birds that are not observed well are Ashy Petrels (Oceanodroma homochroa). While working in the skiff on 17 August attempting to recover a