ZooL.— Vol. II.] LOOMIS— CALIFORNIA WATER BIRDS. 317 



III. LIST OF Species. 



^chmophorus occidentalis. Western Grebe. — Only one 

 was observed during the two months. 



Colymbus nigricollis. Eared Grebe. — Less than a dozen 

 were seen, scattered along from Sept. 29. 



Gavia imber. Loon. 



Gavia pacifica. Pacific Loon. 



Gavia lumme. Red-throated Loon. — Loons occurred 

 from the outset, chiefly as passing migrants. They gradu- 

 ally increased in numbers until finally they became very 

 common, particularly from the middle of October onward. 

 Whether facijica and licnime were present during the early 

 part of my visit was not positively determined. 



Lunda cirrhata. Tufted Puffin. — Few were noted. 



Cerorhinca monocerata. Rhinoceros Auklet. — None 

 were seen in September and only a very few in October. 

 In November they became more plentiful. 



Ptychoramphus aleuticus. Cassin's Auklet. — Occur- 

 ring at irregular intervals after Oct. 25, they became decid- 

 edly common Nov. 10. 



Cepphus columba. Pigeon Guillemot. — Three yaung- 

 of-the-year were observed in September and eight adults at 

 the close of October. Two of the latter were taken, and 

 were in pied plumage. 



Uria troile. Murre. — The following are all that were 

 positively identified: Single birds on the 22nd, 25th, and 

 26th of September; six on the 28th; single birds on the 

 8th, 14th, and 23rd of October and 5th of November; two 

 on the nth and two on the 14th of November. 



Stercorarius pomarinus. Pomarine Jaeger. — The mi- 

 gration of this species appeared to be nearly over on my 

 arrival. After September only stragglers were noticed. 



