764 
U. S. P. R. R. EXP. AND SURVEYS-ZOOLOGY-GENERAL REPORT. 
Comparative measurements of species. 
Catal. No. 
Species. 
Locality. 
Sex. 
Length. 
Stretch of 
wings. 
Wing. 
Tail. 
Tarsus. 
Middle toe. 
Its claw 
alone. 
Bill above. 
Along gape. 
Heigtht of 
bill at base. 
Width of 
bill at base. 
Specimen 
measured. 
2128 
s 
17.75 
6.68 
3.10 
3.50 
0.50 
1.84 
2.10 
35.00 
63.50 
18.00 
10402 
36.50 
19.50 
7.12 
3 24 
3.90 
0.60 
2.04 
2.22 
1.00 
1.00 
10401 
A 
36.50 
19.10 
7.10 
3.26 
3.62 
0.52 
2.20 
2.30 
1.02 
1.02 
Fresh 
9960 
37.00 
17.75 
6.70 
3.31 
3.60 
0.44 
1.92 
2.01 
1.00 
1.00 
9962 
20.75 
7.54 
3.62 
3.64 
0.60 
2.02 
2.20 
1.02 
1.02 
1192 
O 
36.00 
18.00 
6.84 
3.16 
3.22 
0.40 
2.00 
2.30 
1.02 
1.02 
37.50 
63.50 
18.00 
5471 
18.75 
5.80 
3.70 
3.50 
0.40 
1.92 
2.04 
0.90 
0.82 
9961 
18.00 
6.10 
3.32 
3.24 
0.50 
2.00 
2.04 
1.02 
1.02 
9954 
30.00 
18.00 
5.80 
3.06 
3.06 
0.42 
1.70 
1.84 
0.92 
0.92 
9554 
27.50 
16.50 
5.54 
2.74 
2.60 
0.42 
1.50 
1.60 
0.80 
0.80 
5994 
18.00 
6.30 
3.44 
3.30 
0.46 
1.62 
1.90 
0.80 
0.90 
4529 
15.50 
6.20 
2.74 
2.64 
0.48 
1.44 
1.50 
0.74 
0.74 
30.00 
15.80 
5.60 
2.70 
2.50 
0.44 
1.62 
1.76 
9956 
13 60 
4.66 
2.70 
2.50 
0.34 
1.36 
1.42 
0.70 
0.64 
2727 
30.00 
15.80 
5.60 
2.70 
2.50 
0.44 
1.62 
1.76 
1199 
O 
22.00 
12.84 
4.60 
2.26 
2.25 
0.33 
1.32 
1.40 
23.50 
45.50 
12.75 
9965 
27.00 
12.90 
4.46 
2.30 
2.20 
0.34 
1.22 
1.50 
9964 
29.00 
13.80 
4.98 
2.30 
2.25 
0.40 
1.23 
1.50 
1801 
28.20 
17.00 
4.14 
2.76 
2.42 
0.36 
1.40 
1.40 
BERNICLA CANADENSIS, Boie. 
Canada Goose. 
Anas canadensis, Linn. Syst. Nat. I, 1766, 198.— Forster, Phil. Trans. LXII, 1772, 383. —Wils. Am. Orn. VIII, 
1814, 52; pi. lvii. 
Anser canadensis , Vieill. Nouv. Diet.—Sw. & Rich. F. Bor. Am. II, 1831, 468.— Nutt. Man. II, 349.— Aud. Orn. 
Biog. Ill, 1835, 1 : V, 607 ; pi. 201.— Ib. Syn. 270.— Ib. Birds Amer. VI, 1843, 178; pi. 376. 
Cygnus canadensis, Steph. Shaw’s Zool. XII, ii, 1824, 19. 
Bernicla canadensis, Buie, Isis, 1826, 921. 
? Anserparvipes, Cassin, Pr. A. N. Sc. VI, Oct. 1852, 188. (Vera Cruz.) 
Sp. Ch.— Tail of eighteen feathers. Head, neck, bill, and feet, deep black. A large triangular patch of white on the cheeks 
behind the eye; the two of opposite sides broadly confluent beneath, but not extending to the rami of lower jaw; a few whitish 
feathers on lower eyelid. Upper parts brown, edged with paler. Under parts light, with a tinge of purple gray, sometimes a 
shade of smoky brown ; the edges of the feathers paler; the color of the body of the feathers, though similar, becoming deeper 
on the sides, tibia, axillars, and inside of wings. The gray of the belly passes gradually into -white on the anal region and 
u nder coverts; the upper tail coverts are pure white. The primary quills and rump are very dark blackish brown; the tail 
feathers are black. Length, 35 ; wing, 18; tarsus, 3.10 ; commissure, 2.10. 
Ilab. —Whole of North America. Accidental in Europe. 
In comparing quite a large series of Canada geese together, I have found very great 
discrepancies in dimensions, as will he sufficiently evident from the table of measurements. I 
find almost every size between wide extremes, with great variations in size and proportions of 
the bill, as well as much difference in the shade and continuity of color. In several instances 
