8 Common (?) Tern Total Observations - 5 One bird on 8 June and four birds in the Gulf of Panama were of the Arctic/Common/Forster type but since Common is the bird most likely to be in these waters the observations are almost surely of this species. The Panama birds were in nonbreeding plumage. Sabines Gull Total Observations - 10 A pair and a group of six birds were in the coastal feeding areas on 5 June. A pair was observed inside the Gulf of Panama; no dark heads were noted on these birds. Ring-billed Gull (Larus delewarensis) Total Observations - 1 A single bird with remanents of dark on the head but otherwise adult plumaged was attracted to the ship off western Panama. Xantus (?) Murrelet During a nocturnal watch, north of Guadalupe Island, several (10 ½) Alcids were seen in an hour's time. It is presumed to have been this species. Marine Mammals Porpoises and whales were frequently seen from the Gulf of California south to Coast Rica. The Gulf of Tehuantepec was particularly rich. Nightly from 5-10 June porpose were seen riding the bow wave. One seal/sea lion sp. was seen 60 miles northwest of Guadalupe Island. Further information and complete sightings can be found in the original log sheets. Turtles Sea Turtles (Green?) were common on 4 June off Cabo Corriente. Many (5/hr.) were sunning in the calm ocean. About one-half of the sightings were noted with birds perched on the exposed carapace. Black Terns and Brown Boobies were seen riding. Turtle sightings diminished slightly on 5 June and after that only one turtle was seen (11 June). A clapping pair was seen and approached in the skiff on 5 June. Evidently a pair in coitus cannot dive. While attempting to noose them, manipulation with a boat hook finally broke the males hold and both dove.