250 CALIFORNIA ACADEMY OF SCIENCES. 



flock would dive almost simultaneously and appear again in 

 a more scattered bunch a short distance away. Their tame- 

 ness made them objects to be stoned by Mexican boys who 

 occasionally killed and wounded some. 



3. Colymbus dominicus Liuu. 



St. Domingo Grebe. — "Very common at San Jose, Mira- 

 flores and Santiago, in the winter of 1882-83, but not 

 recognized the previous winter." (Belding). 



4- Podilymbus podiceps (Linn ) 



PiED-BiLLLED Grebe. — Observed only by Mr. Belcling 

 from the Cape region. At San Quintin Bay Mr. Anthony 

 has seen them in winter and about the kelp on the coast. 



5. Urinator imber (Gunn.) 



Loon. — Two were seen by Mr. Belding at La Paz, January 

 27, 1883, and one was shot at San Quintin Bay in May. 



6. Urinator pacificus (Lawr.) 



Pacific Loon. — An adult specimen in breeding plumage 

 was found dead on the shore of Guadalupe Island by Dr. 

 Palmer in 1875. 



7. Cerorhinca monocerata* (PalL) 



Ehinoceros Auklet. — Two specimens were taken by 

 myself in January, 1885, at the southern end of Cerros 

 Island. 



8. Ptychoramphus aleuticus (Pall ) 



Cassin's Auklet. — Mr. Anthony has found it nesting as 

 far south as San Geronimo Island. I have recorded them 

 from Cerros Island where they were rare in January, 1885. 



9. Brachyramphus hypoleucus Xantns. 



Xantus's Murrelet. — First taken from the Cape region 

 by Mr. Xantus, but not recorded from the Pacific coast of 

 the peninsula. Dr. Cooper, however, notes it from Santa 

 Barbara Island, Alta California, where it was breeding, and 

 Col. N. S. Goss collected two specimens near San Diego, 

 just north of the boundary line. 



