to 8 November) were found largely in Section T, the typical high-density area throughout the summer and fall. The usual slick areas were not noted, however, in conjunction with the Phalaropes during the previous survey, although slicks were found further south. During this survey the slick areas and the Phalarope concentrations were again found simul- taneously, but about 100 miles south of the old "T" area locations. The importance of the simultaneous occurrence of Phalaropes and the slick areas should be stressed; no other species shows such a high positive 'correlation with an environmental parameter. More needs to be known about the slicks themselves. Phalaropes, one of the major elements of the Grid avifauna, are as yet the least understood. The sex ratio of the 19 birds collected on the 18th heavily favored females 14:4 (1 not sexed). Winter and spring 1967 collections indicate that females apparently winter in the Grid area while most males move further to the south. High priority should be given to obtaining a large series of this in- teresting species. Jaegers Stercorarius sp. # Obs. = 18 0 .048 .188 0 0 .190 0 0 0 Linear density Pomarines were positively identified and I feel that most, if not all, Jaegers were indeed this species. Two adults (1 light and 1 inter- mediate phase) were seen but most of the sightings appeared to be non- adults, generally light phase. The distribution within the Grid is clearly a function of proximity to the coast. Skua Catharacta skua # Obs. - 1 One skua was seen heading south in Section S on the 17th. Glaucous-winged Gull Larus glaucescens # Obs. = 2 The two sightings in Sections U and Y were of first winter-plumaged birds. Herring Gull Larus argentatus # Obs. = 18 No birds were recorded in the southern third of the Grid in the early November survey. During the present survey two immatures were logged in Sections X and Z representing the southward movement of the species, especially of the immatures (see Figure 2). The three adults recorded were all in the northern half of the Grid.