360 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



Others (apparently immature) have the white more or less 

 variegated with gray, the chin and throat being densely 

 mottled, sparsely mottled, or faintly streaked, and the breast 

 and abdomen, in extreme examples, transversely marked. 

 The majority of forty-seven specimens have whitish mixed 

 with the dark color of the lower tail-coverts. 



In certain Black-vented Shearwaters (apparently imma- 

 ture birds) the white of the lower parts is also invaded by 

 gray, the jugulum and throat being mottled, and in some 

 cases the chin and fore-breast. An extreme specimen is 

 sparsely spotted on the abdomen and posterior portion of 

 the breast. Some specimens display considerable white on 

 the lower tail-coverts. The chord of the longest wing, in a 

 series of eighty-seven specimens, measures 9.6 inches. 



Puffinus griseus. Dark-bodied Shearwater. — From 

 the outset, these Shearwaters were abundant. On several 

 occasions large numbers were congregated on the water 

 feeding. During a dense fog on the morning of June 2, 

 and again on the morning of the 3rd, many in going down 

 the coast passed within a few hundred yards of the Mon- 

 terey wharf, illustrating the deflecting influence of low fogs 

 upon movements. 



In a series of eighty-three specimens, several have the 

 chin and anterior portion of the throat white, more or less 

 obscured by gray. The breast in some specimens presents 

 a decidedly mottled appearance, the feathers being exten- 

 sively white or whitish. Two specimens are albinistic; one 

 of them has much of a greater covert white, and the other 

 has the throat largely white. A bird having white on the 

 scapular region was seen, but not captured. 



Oceanodroma homochroa. Ashy Petrel. — A few small 

 Petrels, seemingly this species, were seen June 5 as they 

 winged their way northward over the ocean. 



Phalacrocorax dilophus. Double-crested Cormorant. 

 — Only on one occasion. May 4, was this species satisfac- 

 torily identified. 



