1923] Totcnsend, Birch CoUccUd in Lower California 5 



Gavia pacifica (Lawrence) 

 Pacific Loon 

 One specimen was taken April 11 at Tiburon Island where it was 

 lather abundant. Our notes do not show that it was observed elsewhere. 



Cerorhinca monocerata (Pallas) 

 Rhinoceros Auklet 

 A single specimen was secured at San Cristobal Bay on March 15. 

 There are no records of this auklet having been found farther south. 



Ptycorhamphus aleuticus (Pallas) 

 Cassin's Auklet 

 Four specimens taken: Guadalupe Island, March 2-4, and West 

 San Benito Island, March 10. We found parts of East Benito so riddled 

 with burrows of auklets that it was difficult to walk without breaking 

 into them. When cruising in the schooner 'Laura' late in November, 

 1884, 1 took two specimens of this auklet off San Cristobal Bay. 



Brachyrhamphus craverii (Salvadori) 



CllAVERl's MuRRELET 



This bird we found only at San Esteban Island in the Gulf, where a 

 single example was secured April 14. San Esteban Island is about 

 twenty miles from Isla Raza where Dr. T. H. Streets found Craveri's 

 murrelet breeding in abundance in April, 1875. The species is peculiar 

 to Lower California and the Gulf regions. 



Larus Philadelphia (Ord) 



Bonaparte's Gull 



Specimens were taken at Carmen Island, April 3, Mulege, April 4, 



and Tiburon Island, April 12. It was fairly common at La Paz on April 18 . 



On March 27, 1889, 1 obtained this gull in the northern part of the Gulf. 



Larus heermanni Cassin 

 Heerman's Gull 

 This species was observed from April 1 to 19 at many points in the 

 Gulf, from Ceralbo Island northward to Angel Guardia and Tiburon 

 islands. It breeds in considerable numbers at Isla Raza and Ildefonso. 



Sterna maxima Boddaert 

 Royal Tern 

 Numerous at San Josef Island on March 30 and at Guaymas on 

 April 15. Specimens were obtained at San Cristobal Bay, March 15, 

 Abreojos Point, March 16, and Angel Guardia Island, April 10. 



