5 
Puffinus tenuirostris . Slender-billed Shearwater. We observed this 
species commonly in the vicinity of the Aleutian Islands on the Bering Sea 
side. The most southerly of our records vas 50° 38'N 172° 51 f E- Upon 
our return to the Adak area on 19 October we observed only five, indicating 
the southward migration was nearly over. 
Pterodroma inexpectata . Scaled Petrel. Several observed on the Bering 
i ° „ 
Sea side of the Aleutians and south to 4l N. One specimen was collected 
at 49° 32'N 173° 00 r E. Kenyon (unpublished manuscript) reports seeing 
several at 55° 28'N 175° 25*W which is the first report from the Bering 
Sea. It appears that the northwest Pacific area is one of the major 
Wintering areas of this species. 
Pterodroma sp. Several small white-bellied Pterodroma were seen below 
46° 52 1 N 173° 38 1 E. We collectively called them Cook r s-Bonin Island as 
we were unable to obtain specimens. The Cook's Petrel has been taken on 
Adak Island in the Aleutians. 
Oceanodroma furcata . Fork-tailed Petrel. The Fork-tailed Petrel was 
seen as far south as kl° 35 'N 172° 55 f E. It was never very common which 
may reflect the difficulty in seeing it against the gray waters of the 
North Pacific. 
Oceanodroma leucorhoa . Leach's Petrel. The most common petrel in the area 
covered by the cruise. There is a possibility that we were also seeing 
some Oceanodroma castro but this could not be ascertained. 
Oceanodroma markhami . Sooty Storm Petrel. Petrels thought to be this 
species were first seen at 44° 51 T N 173° 02'N and south to 4l°N 173°2. 
\ 
It was Impossible to be positive of tbe identifications except that they 
were large dark petrels. The forked tail was distinctly seen in at least 
