30 
supposed to prevail. More disturbing still is the occurrence of typical 
or even ultra-typical individuals far from their centres of apparent pre- 
dominance and deep in the range of other forms. Some of these cases can 
be explained by migration or other factors, others cannot be so easily 
disposed of and remain to disturb otherwise satisfactory hypotheses. 
1. 
Am. Mas. 
64128 
SPECIMENS EXAMINED 
I 
Spring Females 
Yellowish Group 
Disko is., Greenland July 
28, 1893 
2. 
M.C.Z. 
100939 
Bedford Pim is., Frank 
16, 1900 
Almost white 
3. 
N.M.C. 
20799 
Nettilling 1., Baffin is 
19, 1925 
Largely white 
4. 
4( 
20754 
it 
10, 1925 
u 
5. 
U 
8076 
Coronation gulf, N.W.T 
. .June 
19, 1911 
5, 1914 
Breeding 
6. 
it 
7915 
Collinson pt., Alaska 
7. 
it 
7956 
it 
4, 1914 
8. 
it 
7922 
it 
9, 1914 
9. 
ti 
7921 
it 
9, 1914 
Breeding 
10. 
u 
7919 
a 
. June 
9, 1914 
it 
11. 
U.S.N.M. 
93158 
Pt. Barrow, Alaska 
. July 
14, 1883 
12. 
M.V.Z. 
32170 
Jade ints., Alaska 
. . May 
28, 1899 
Breeding 
13. 
it 
9796 
Pt. Snettisham, Alaska 
. . Aug. 
29, 1909 
Juvenile 
14. 
M.C.Z. 
205490 
Anticosti is., Que 
. . July 
10, 1881 
Breeding 
15. 
U.S.N.M. 
436751 
Fort Yukon (Alaska?) 
, 1864 
16. 
M.V.Z. 
42035 
Near Hazelton, B.C 
. . Aug. 
5, 1921 
17. 
u 
44719 
Atlin, B.C 
. . Aug. 
1, 1924 
Breeding 
18. 
N.M.C. 
16282 
Taylor is., Victoria is 
. July 
21, 
Pale 
19. 
A.M.N.H. 
64129 
II 
Spring Females 
Greyish Group 
Disko is., Greenland 
. . July 
28, 1893 
20. 
P.A.S. 
30139 
it 
. .July 
16, 1892 
21. 
it 
26963 
Svarte Huk, Greenland 
..July 
8, 1891 
22. 
A.M.N.H. 
67820 
White str., Baffin is 
. .July 
25, 1896 
23. 
N.M.C. 
21147 
Amadjuak bay, Baffin is 
. .Aug. 
7, 1926 
24. 
it 
20793 
Nettilling lake, Baffin is 
16, 1925 
25. 
it 
20772 
« 
13, 1925 
26. 
it 
20800 
a 
19, 1925 
27. 
it 
20771 
a 
13, 1925 
28. 
29. 
Bent 
U.S.N.M. 
10804 
94437 
Baffin is 
Ft. Chimo, Ungava 
. Aug. 
27, 1882 
30. 
C.M. 
74236 
McLelan str., Ungava 
. . Aug. 
10, 1920 
31. 
it 
50204 
Nastapoka r., Ungava 
Ft. Chimo, Ungava. . 
3, 1915 
32. 
U.S.N.M. 
94441 
. . Aug. 
10, 1882 
33. 
it 
94432 
a 
. Aug. 
27, 1882 
34. 
35. 
Milwaukee 
N.M.C. 
16304 
Bona venture is., Que 
Taylor is., Victoria is 
Cap mt., Mackenzie 
. .July 
8, 1922 
30, 1919 
36. 
it 
18554 
. . July 
12, 1922 
37. 
M.V.Z. 
44721 
Atlin, B.C 
. . Aug. 
6, 1924 
