Vol. II, Pt. I] GIFFORD— BIRDS OF THE GALAPAGOS ISLANDS 21 



hundreds of eggs. In addition to a large number used for 

 food, we preserved 379, representing as many sets. A num- 

 ber of downy young of various ages were also taken. 



After leaving Clipperton, Sooty Terns were not often ob- 

 served, only six being seen on the voyage to the Galapagos 

 Islands : 



August 16, latitude 8° 1' North, longitude 105° 22' West — 

 one. 



August 19, latitude 7° 21' North, longitude 103° 40' West — 

 one. 



August 26, latitude 3° 41' North, longitude 94° 16' West — 

 two. 



September 2, forty miles south of Cocos Island, Costa Rica 

 — an immature male taken. 



September 16, latitude 3° 6' North, longitude 84° 9' West — 

 an immature one. 



On the homeward voyage Sooty Terns were observed twice. 

 The first instance occurred on September 27, 1906, two days 

 after leaving Culpepper, our position being latitude 5° 34' 

 North, longitude 95° 27' West. About noon a flock of thirty 

 or forty, with three or four Man-o'-war Birds following them, 

 were seen working in a southeasterly direction. The second 

 instance occurred on October 18, in latitude 16° 55' North, 

 longitude 112° 55' West, when a single individual flew by the 

 vessel. 



Fifty-two skins of this species were brought back, twenty- 

 seven of which are adult. Fourteen are downy young of vari- 

 ous ages from Clipperton Island. The remaining eleven are 

 immature birds. Of these, seven are in the dusky juvenal 

 dress; with buff tips to the dorsal feathers posterior to the 

 hind neck, and vinaceous-cinnamon tips to the under tail- 

 coverts. They were taken from nests on Oneal Rock, and, 

 although their wings were not full grown, they were probably 

 able to fly. An immature male (No. 1351 C. A. S.) taken in 

 latitude 19° 40' North, longitude 112° West, on July 25, 1905, 

 shows considerable dark coloration below and on the sides of 

 the head, and is evidently going through the first prenuptial 

 moult. The old dorsal feathers are so worn that it is impos- 

 sible to distinguish any pale tips. At any rate the new scapu- 



