110 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser. 
to November. Scouts arrive early (Mr. Beck’s earliest record 
being four shot and four others seen, February 27, 1907) and 
stragglers linger on into December. So far as I know, the 
species has not been reported north of Point Arena, California." 
According to Mr. Gifford, during the voyage of the Academy 
this shearwater dropped out of sight on July 22, 1905, in lati- 
tude 22° 25’ N. and longitude 112° 40’ W., and was not met 
with again, its migration-route being inside of the schooner’s 
course. 
Dr. Godman has called attention to “a dusky phase of plum- 
age,” but the extremes of coloration are greater than he sur- 
mised. In the light extreme, the general color aspect from bill 
to crissum is white uninterrupted by gray, while in the dark 
extreme this aspect is superficially gray. In the darkest of the 
one hundred and thirty-nine specimens before me (No. 16059 
C. A. S., male; plate 13) the chin, throat, and jugulum are 
heavily barred with gray and grayish white, and the rest of the 
lower parts is densely clouded with gray; the sides of the head, 
neck, and body and the lower tail-coverts are without white 
variations; the lining of the wings and axillaries are dark 
brownish gray, the former variously varied and the latter 
slightly tipped with grayish white. Only three other specimens 
of the series are of this extreme dark phase. One of them 
(No. 18557 Mus. Vertebr. Zool. U. C., female) is not quite so 
dark below as No. 16059; the remaining two (Nos. 15759 and 
15760 C. A. S., males) are still lighter, and grade through 
intermediates of all sorts into six extreme examples of the 
light phase, of which No. 9387 C. A. S., female (plate 13), is 
typical. In this specimen the concealed portions of the longer 
primaries are white; the lining of the wings presents chiefly a 
white surface, and white rather predominates on the shorter 
lower tail-coverts ; the abdomen is immaculate, save a few faint 
indications of gray near the crissum. It is a notable circum- 
stance that growing feathers in both phases are like the worn 
ones they are replacing. 
1 Since the completion of this paper, the following has been communicated to me by 
Mr. Stanton Warburton, Jr., of Tacoma, Washington: ‘“‘Shearwaters were first seen 
[by me] off the coast of Clallam County, Washington, June 28, 1917. Both the Pink- 
footed and the Sooty were common there, the Sooty being the most common. On the 
29th, a pair of each was collected. On the 30th, off the coast of Grays Harbor County, 
Washington, about thirty miles, one Black-footed Albatross was seen, as well as 
quite a few of both the above kinds of shearwaters.” 
2 Mon. Petrels, p. 103. 
