6 Bulletin American Museum of Natural History [Vol. XLVIII 



Sterna elegans Gambel 



Elegant Tern 



Common in April at several points in the Gulf from La Paz to Angel 



Guardia and San Esteban islands. Observed at Guaymas, April 15. 



Sixteen specimens, one of which was obtained on the west side of the 



peninsula at Abreojos Point, March 16. 



Puffinus opisthomelas Coues 



Black-vented Shearwater 

 One specimen, San Bartolome Bay, March 13. 



Oceanodroma macrodactyla W. Bryant 

 Guadalupe Petrel 

 Two specimens, Guadalupe Island, March 2-5. 



Oceanodroma kaedingi Anthony 



Kaeding's Petrel 



While the 'Albatross' was anchored at Guadalupe Island, March 



2-5, nine specimens were captured on board at night, doubtless attracted 



by the electric lights around the deck house. Petrels were very numerous 



and their calls were heard about the vessel all night. 



Oceanodroma melania Bonaparte 

 Black Petrel 

 Two specimens, San Jose del Cabo March 26 and San Francisquito 

 Bay, April 9. On a former voyage I found this petrel abundant off 

 Guaymas. 



Oceanodroma homochroa (Coues) 

 Ashy Petrel 

 One specimen, taken on board at night, off San Benito Islands, 

 April 23. 



Sula brewsteri Goss 



Brewster's Booby 



Observed in the Gulf from March 30 to April 18, at most of the 



points visited by the expedition. One specimen, taken at San Josef 



Island, March 31. In 1889 I found this booby breeding in considerable 



numbers at Georges Island near the head of the Gulf. 



In 1888 Col. N. S. Goss estimated that about 700 of this species 

 and about 1000 blue-footed boobies were breeding on San Pedro Martir 

 Isle, which lies midway in the Gulf about 25 miles south of Tiburon 



