1917 BIRDS OF THE SOUTHERN CALIFORNIA ISLANDS 
ie) 
uw 
Cepphus columba (4) Baird, Brewer and Ridgway, Water Birds N. Am., 11, 1884, p. 495. 
(5) Blake, Auk, tv, 1887, p. 328. (6) Streator, Orn. & Ool., x111, 1888, p. 538. (7) Grin- 
nell, Pasadena Acad. Sci., 1, 1897, p. 23. (8) Grinnell, Pasadena Acad. Sci., m, 1898, 
p. 6. (9) Davie, Nests & Eggs N. Am. Birds, 5th ed., 1898, p. 18. (7/0) Grinnell, Pac. 
Coast Avif., 3, 1902, p. 11. (717) Linton, Condor, x, 1908, p. 125. (72) Willett, Con- 
dor, x11, 1910, p. 172. (73) A. O. U. Check-list, 3d ed., 1910, p. 31. (74) Willett, Pac. 
Coast Avif., 7, 1912, p. 12. (15) Wright and Snyder, Condor, xv, 19138, p. 88. (16) 
Grinnell, Pac. Coast Avif., 11, 1915, p. 19. 
Pigeon Guillemot (/7) Willett, Condor, x11, 1910, p. 171. 
Common resident about the northern islands. J. G. Cooper (1) recorded 
this species from San Clemente in the sixties, and Willett (74) saw three birds 
near San Nicolas, June 26, 1911. I have seen a few near Catalina during April, 
and J. Grinnell (8) noted several in the same locality in December, 1897. The 
most southerly breeding station recorded is Santa Barbara Island, where J. Grin- 
nell (8) found fresh sets of eggs May 15, 1897, and H. Wright (15) saw birds 
carrying food into the caves July 3, 1912. 
D. R. Dickey (MS) says that on Anacapa, June 22, 1913, these birds were 
nesting in almost every tidal cave. Sites were chosen well back in the dark, 
where the dripping water and dank moisture would seem to make it impossible 
for eggs to hatch, but, nevertheless, most of the nests contained young. 
H. Wright (15) found them breeding in considerable numbers near the 
north end of Santa Cruz Island, July 10, 1912, and A. van Rossem and I saw sev- 
eral off shore from Prisoners Harbor, April 24, 1911. On San Miguel, G. Willett 
(12) says they were breeding commonly in the caves and niches all around the 
island. On June 23, 1910, he found the contents of the nests to vary from fresh 
eggs to young of all sizes. 
1153, Uria troille californica (H. Bryant) 
CATIFORNIA MurRE 
Uria t[roille]. californica (1) Willett, Condor, x11, 1910, p. 172. 
Uria troille californica (2) Willett, Pac. Coast Avif., 7, 1912, p. 12. (3) Wright and Sny- 
der, Condor, xv, 1913, p. 88. (4) Grinnell, Pac. Coast Avif., 11, 1915, p. 19. 
Records from the mainland indicate that during the winter, this bird may be 
found as far south as Catalina at least. During the spring they occur in some 
numbers in the vieinity of Santa Cruz Island, where A. van Rossem and I en- 
countered them in April, 1911, but the only place in this group where they have 
been found breeding is on Prince Islet, near San Miguel. J. S. Appleton and H. 
C. Burt (2) discovered this colony on June 6, 1906, and took fresh and slightly 
incubated eggs. H. Wright (3) states that on July 12, 1912, there were several 
small colonies there, aggregating probably one hundred pairs, which at this date 
mostly had young. 
16. Rissa tridactyla pollicaris Ridgway 
Paciric KirriwakE 
Rissa tridactyla pollicaris (1) Anthony, Auk, xv, 1898, p. 267. (2) Willett, Pac. Coast 
Avif., 7, 1912, p. 13. 
Probably a regular winter visitant, although there are but few records. <A. 
