60 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH SER. 
2. An adult of the vanguard was taken June 22 and a young- 
of-the-year June 29. In 1909, through the fall and during 
December they were not uncommon. In January, 1910, their 
ranks appeared to be thinned, as only a few were met with. 
A male, February 18, had assumed to a considerable extent 
the nuptial dress. March specimens of the Academy’s series 
approach more nearly the complete attire. A male, March 26, 
is apparently in nearly full feather. 
15. Brachyramphus hypoleucus. Xanrtus’s Murreter.—lt 
is a remarkable circumstance that Xantus’s Murrelet, a bird 
breeding in the subtropics, should occur in the vicinity of 
Point Pinos in midwinter with the Ancient Murrelet, a bird 
breeding in boreal regions. My records for the vicinity of 
Point Pinos are as follows: 
From November 24, 1904, to February 4, 1905, Xantus’s 
Murrelets were seen nearly every time a trip was made to the 
seaward of Point Pinos. On the 6th of December eleven were 
captured and on January 2 twenty were seen, ten of which 
were taken. They were common up to the day of my depar- 
ture, February 25. 
In 1907, a pair, flying northward, was seen on April 25; on 
July 29, several pairs were also seen winging their way north- 
ward; eleven specimens were prepared in August after the 
13th of the month; September 2, fifty or more, mostly in pairs, 
were observed as they were flying out of the bay; they were 
common on September 6, one little company numbered half a 
dozen; a few were noted along to December 5. 
During my stay in 1909 they were scarce. 
Mr. Gifford informs me that the lining of the wings in the 
Academy’s series of thirty-six specimens shows a complete 
intergradation between the white and gray aspects said to 
characterize B. hypoleucus and “B. craverw’ respectively. 
Further, No. 10,197 has the lining of the wings chiefly white, 
but exhibits no white on the exposed portion of the inner web 
of the outer primary, and but little of the white tipping on 
the dark colored feathers on the sides of the body. No. 15,820 
has the white lining of the wings and the white inner web of 
the outer primaries, and, when viewed superficially, appears 
to lack the white tipping of the feathers on the sides of the 
body. Closer examination, however, reveals under the surface 
new feathers with white tips. 
