Annotated List At Sea Observations - U.S.S. Tawakoni Oct.3 - Oct. 8 1963 1. Puffinus pacificus Seen daily throughout the trip. General decline of numbers until Oct. 5 and subsequent increase with larger proportion of dark phase birds may indicate two different pelagic populations. 2. Puffinus nativitatus Due to general inexperience of observers specific identification of dark shearwaters was difficult. Sibley identified several on Oct. 7. 3. Puffinus griseus One unquestionable sight identification on Oct. 6 by Clapp and Sibley. Another, possibly this species, was seen on Oct. 8. 4. Pterodroma sp. Bonin Petrels were seen with some regularity after leaving Oahu. One was collected by Sibley and Bratley at 0907 Oct. 7, 1963. Several other birds belonging to the genus were seen but generally under conditions in which collecting was impossible. 5. Oceanodroma castro Two birds of this species were seen on Oct. 8. 6. Oceanodroma sp. A very small dark bird with a rapid wing beat was seen on Oct. 4 and may possibly have been the Sooty Storm Petrel. 7. Bulweria bulwerii One was seen Oct. 6, three Oct. 7 and two Oct. 8. 8. Phaethon lepturus This species was seen intermittently throughout the trip. A total of 6 observations, the one furthest south at approximately 6 14'N. latitude and at 171 31 W. longitude. 9. Phaethon rubricauda Seen on Oct. 5 and on Oct. 8. The first observation was at approximately 13 48' N. latitude and 164 20'W longitude.