ZooL.-VoL. II.] LOOMIS— CALIFORNIA WATER BIRDS. 301 



mouth of the bay we were becalmed. Rowing outside of 

 Cypress Point, a strong head wind was encountered, forc- 

 ing us to stand out to sea fully twelve miles. At half past 

 ten the wind began to come in puffs and soon after hauled 

 round into the northwest. By the time Point Pinos was 

 doubled there was only a light breeze. The long tack 

 developed no offshore migration. However, scattering 

 Black-vented Shearwaters, going up the coast, were found 

 as far out as we went. Near land a goodly number of 

 Loons in bands passed down the coast. Otherwise there 

 was no conspicuous southward movement. Two adult 

 Murres are worthy of note. 



Simimary of Southward Movements. — With the daily 

 fluctuations from the passage of migratory waves, some 

 birds waned as the season wore on (the Northern Phala- 

 rope, Pomarine Jaeger, and Dark-bodied Shearwater for 

 example), and others waxed in the scale of abundance, as 

 the Loons, Surf Scoter, and Black-vented Shearwater. 

 The Western Gull, while varying from day to day as the 

 waves rolled southward (young or old predominating), 

 maintained a comparatively even average through the sea- 

 son. In some species there was a marked hiatus inter- 

 vening between the summer and winter occurrences, as 

 observed in previous years; there apparently existing a first 

 or late summer migration, and a second or late autumn 

 migration bringing the winter visitants — examples, Western 

 Grebe, Cassin's Auklet, Marbled Murrelet, Murre. Less 

 pronounced periods of absence at the outset were noted in 

 the California and Heermann's Gulls, and perhaps in the 

 White-winged Scoter. A sort of aftermath of stragglers 

 occurred in certain of the declining species, as in the Red 

 Phalarope and Dark-bodied Shearwater. 



The following examples illustrate the currents and 

 counter-currents in the tide of southward movement: — 



