52 



ORNITHOLOGICAL EXPLORATIONS. 



process is finished the young bird is essentially like the adults, but 

 whether partaking in the breeding during the firstyear I cannot say with 

 certainty. I am inclined to think, however, that the still immature 

 birds remain on the high sea away from the rookeries during the breed- 



FlG. ]. — Lunda cirrhala, jun. Copper Island, July 30, 1883. 



ing season, for I never saw a breeding bird like that shot by me on 

 Copper Island on the 30th of July (fig. 1, text), which even at that 

 late date had the grooves only just perceptible ; it was shot a distance 

 off shore, and judging from its conduct and its perfect plumage at that 



Fig. 2. — Lunda cirrhata, jun. Bering Island, June 4, 1883. 



time was not engaged in the incubating business. In all probability 

 this is only a veiy late bird, holding the same relation to pi. ii, fig. 3, 

 as does fig. 2, text, to pi. ii, fig. 4. But while I feel quite sure that 

 this bird and others of the same stage did not breed that season, I 



