11 
Rissa tridactyla pollicaris Ridgway. Pacific Kittiwake 
Met only on return voyage, first on July 13 at Broughton bay, Shimishir 
island, and later at Petropavlovsk, Kamchatka, where it was breeding. 
It was last seen at Nikolski, Bering island, on August 3. These beautiful 
gulls frequented the inner harbour at Petropavlovsk, coming from the bird 
rocks at the entrance to the bay. Their fishing methods were very pretty 
and spectacular. July 27 “a small flock flew around the ship in a limited 
area and every moment one or other would dive splendidly — quite out of 
sight. They dived like terns or kingfishers — with a smack. After reap- 
pearing, the bird always paused a moment with uplifted wings before 
taking to the air again.” 
Regarding the colour of soft parts: “gape toward back, bright ver- 
milion red; eye-ring the same colour; iris rich brown; feet black; bill pale 
yellow, of a greenish tinge.” 
$ Petropavlovsk, Kamchatka. July 16 
8 “ “ “ 16 
Full adult summer plumage. The hind toes and claws are quite rudimentary and little better 
developed than in many eastern specimens. The bills, however, are slightly heavier than in 
R. t. tridactyla from the gulf of St. Lawrence. 
Lams hyperboreus Gunnerus. Glaucous Gull 
Met only at Cordova and Unalaska, Alaska, three being seen at each 
place in the harbours with the Glaucous-winged Gulls. 
Museum No. 1288 8 Cordova, Alaska. March 15 
Museum No. 1309 o ? Unalaska, Alaska. March 26 
Museum No. 1314 8 “ “ “ 28 
These are all juveniles, pure white with more or less brownish ash below. The last two have 
a slight suffusion of very pale blue in the mantle. The most conspicuous feature about them is 
the large size of 1309. In view of the controversy as to the tenability of L. h. barrovianus it seems 
well to give the following: 
Measurements 
In. In, In. 
1288 wing 16-8 culmen 2-38 depth of bill at base 0-80 
1309 18-7 2 65 0-95 
1314 17 00 2-55 0-80 
Larus glaucescens Naumann. Glaucous-winged Gull 
This is the common gull of the north Pacific and far outnumbered all 
others. They were most numerous in harbours and protected waters in 
spring, but always a few were seen daily at sea. Sometimes young birds 
outnumbered the adults and sometimes it was vice versa. Only grey 
juveniles were met at Nazan bay, Atka island, on April 1, but at Attu 
island, April 20, the dozen pairs in the harbour were all adult — plainly no 
their nesting ground. They mixed indiscriminately with the Herring Gulls 
yet the latter bird very plainly is a bird less of the harbours and more of 
the open sea. Glaucescens in spring disappeared at Bering island, April 24, 
and reappeared there on the return journey August 3, and it is plain that 
the meeting place of this form and the Slaty-backed ( schistisagus ) is in the 
Komandorskis. None was seen at sea between Nikolski and Unalaska, 
but as cape Cheerful, Unalaska island, was approached, two came far out 
to meet the ship. They disappeared again in the open sea between Unalaska 
and Prince Rupert. South of this, along the inside passage, the birds 
were comparatively scarce, though always present. They were doubtless 
staying close to the salmon streams. 
9 Wrangell, Alaska. March 8. Winter plumage. Adult. 
o ? Swanson bay, Alaska. March 11. Summer adult plumage. 
9 Unalaska, Alaska. March 26. Adult winter plumage. 
