July, 1905 | BIRDS FROM THE WEST COAST OF LOWER CALIFORNIA 
107 
ant of the breeding sea-birds met with. The single egg is laid in a burrow in the 
sand, the burrow in certain localities being used in turn by these birds, then by 
shearwaters and lastly by petrels. Fresh eggs were found as early as March 10th. 
r Brachyramphus hypoleucus Xantus. Xantus Murrelet. Fairly common on 
and about Todos Santos, San Martin, San Geronimo and San Benitos Islands, 
breeding most accessibly on San Benitos, where in addition to nesting in the cran- 
nies in the cliffs the nest is often placed under the foliage of the maguey ( Agave 
s/iawi ), on the sandy slopes facing the sea. The eggs, taken March 27th, were 
slightly incubated. No specimens exhibiting the characters of Brachyramphus 
craveri (Salvad.) were noted, craveri being apparently confined to the Cape 
region and Gulf of California." 
~ Rissa tridactyla pollicaris Ridgw. Pacific Kittiwake. A few individuals not- 
ed at San Geronimo Island on March 15th. 
- Larus glaucescens Naumann. Glaucous-winged Gull. Well distributed along 
the northern islands but not common anywhere; noted on San Martin, Todos San- 
tos and San Geronimo Islands March 10th to 15th, and on Guadalupe Island 
March 22nd. 
Larus occidentalis Aud. Western Gull. Noted on Todos Santos, San Martin, 
San Geronimo, Guadalupe, San Benitos, Cerros, Natividad, San Roque and As- 
cuncion Islands; common and breeding during the latter part of March and April. 
This is the only species of the genus found breeding on the trip. 
Larus californicus Lawr. California Gull. Noted only at Todos Santos 
Island, March 10th, where it was not common. 
Larus heermani Cass. Heerman Gull. Common during March on Todos 
Santos, San Martin, San Geronimo and San Roque Islands, but giving no signs of 
breeding. This species is apparently common all along the west coast of Lower 
California during the entire summer, but we found no breeding birds. 
Sterna maxima Bodd. Royal Tern. Noted at Cerros Island April 1st; at San 
Juanico Bay June 12th; near San Martin Island in July; apparently fairly' common 
along the coast. 
— Sterna elegans Gamb. Elegant Tern. A small flock of these truly elegant 
birds was seen off San Domingo Point on June 14th, and several were taken. They 
are not uncommon in the mainland lagoons near Magdalena Bay. 
Sterna fuliginosa Gmel. Sooty Tern. On a large rock lying a few miles to 
the northward of Socorro Island this species was found on May 12th breeding in a 
vast colony, with downy young at this date. 
-Anous stolidus ridgwayi Anthony. Ridgwav Noddy. These birds occupied 
the same rock near Socorro Island as the sooty terns, and were if anything more 
numerous than the latter, having fresh eggs on May 12th. 
Diomedea nigripes Aud. Black-footed Albatross. Common all summer from 
San Diego south to Cape San Lazaro, both far out at sea and along the coast line; 
can be caught with a hook and line at almost any time. One was seen near Clar- 
ion Island in May. 
''Diomedea immutabilis Rothschild. Laysan Albatross. One specimen was 
taken between Guadalupe and San Martin Islands on March 19th. 
Puffinus creatopus CouES. Pink-footed Shearwater. Common off San Domin- 
go Point on June 14th. 
Puffinus opisthomelas Coues. Black-vented Shearwater. Common about San 
Martin Island March 12th; on Guadalupe Island March 22nd, breeding; on San 
Benito Island March 27th, breeding; on Natividad Island, April 10th, breeding in a 
a. Cf. Brewster, Birds of the Cape Region of I y ower California. Bull. Harv. Mus. Comp. Zool., XU, 1902. 
