-5- 72 Wedge-tailed Shearwater (Puffinus pacificus) Two major concentrations were recorded. Predominantly dark phase birds were found in the Central Pacific Water Mass and mainly light phase birds in North Equatorial Current waters. These latter may have been from Clipperton Island where large numbers were recorded at this time last year. Approximately equal numbers of both color phases were recorded on the present cruise. One light phase bird was collected over an oil slick. Sooty Shearwater (Puffinus griseus) Slender-billed Shearwater (Puffinus tenuirostris) 7 The few scattered sightings of these very numerous species indicate that the northward spring migration is not through this area of the Pacific. One Slender-billed Shearwater was collected over an oil slick on 19 March and a Sooty Shearwater came aboard on the night of 26-27^March. Townsend's Shearwater (Puffinus puffinus auricularis) 484 Manx Shearwater (Puffinus puffinus opisthmelas) 181 These two races of the common shearwater are readily distinguishable from each other even at fairly good distance. The Manx is brownish dor- sally with dark flank patches. Townsends is quite black dorsally with prominent white "rump patches" as in the Hawaiian race newelli. A concentration of Manx Shearwaters was noted on 20 February near San Benitos Island and another lesser concentration in a huge mixed feeding flock of Sooty Terns and Townsend's Shearwaters on 22 February at the mouth of the Gulf of California. One specimen of Townsend's Shearwater was collect- ed from this flock. Dark-rumped Petrel (Pterodroma phaeopygia) 3 One specimen was collected at 2°-30'N; 105°W. At this locality the bird could conceivably be from either the Hawaiian area or the Galapagos and racial designation must await comparison of known origin specimens. Juan Fernandez Petrel (Pterodroma externa externa) 35 White-necked Petrel (Pterodroma externa cervicalis) 1 Juan Fernandez Petrels were scattered in low numbers throughout all pelagic areas. Practically every individual was in heavy molt with large white patches in the primary and secondary regions. Two specimens were coll- ect over oil slicks. The one sighting of White-necked Petrel was unmistakable and I am cer-tain that none of these were recorded as Juan Fernandez 'etrels. This in-dividual was in completely new fresh plumage indicating an earlier molt than in the Juan Fernandez Petrels.