March 13 on board "Golden Bean", Coco Is. to San Diego, Cal. both adults went past at this time. The unident. if'dal dark Bootiss seen earlier may have been immatures of this species. In the aftermoon for about 4 to 6 a Parasitic Jaeger was following the ship and I saw 2 others pass the stern. Did not have a continuous watch in the evening. It was cloudy and windy in the early morning, we changed from S to N again. cleared up and became quite pleasant, and then clouded up in the evening. Read Silent Spring after dinner and went to bed early. Our noon position was: 16°24.5'N, 101°, 16.0'W, course 307.1°, off Acapulco. Mex. March 14 a rough windy day today. The ship is taking it badly, however. Could see the coast of Mexico (Guemes & Mt. Isoacan) to the east. From 6 to 7 didn't keep an accurate count - the bows being painted and I can't get to my usual place. During the period I saw about 15 Brown Boobies, mostly in twos + threes, an adult Masked Booby, 3 definite + 2 probable Pomarine Jaegers (intermediate phase with short tails following the ship), 2 Manx Shear- waters, and 5 Wedge-tail Shearwaters. After breakfast did a more careful count. from 7:30 to 8 saw 5 Jaegers, 2 diff. Pomarine, the rest prob. the same. 1) Manx Shearwaters ( 2 group of 3, 1 alone), a Black Petrel 2) Sooty Terns and 54+ Brown Booby. All but 5-6 of the latter were adults; the largest groups was