Vlll 
LIST OF PLATES. 
The irides are the colored circles that surround the pupil. The 
color of these decides the so-called color of the eye.^^ 
Plate IV. Illustrates preparing Skins. — Figs. 1 and 2. 
Corrugated board, used in drying skins ; d, skin on the board, in the 
proper position. Fig.S. A “skin^^ prepared for scientific use ; la- 
bel, on which is marked the number and sex. 
Plate V. Dissected Song Sparrow (Melospiza melodia, Baird), 
illustrating the sexes in the breeding season, as follows : — Fig. 1 . An 
adult female ( 9 ) > L 1> peculiar yellow glands ; 2, ovary; 3, oviduct ; 
4, lungs. Fig. 2. An adult male ($) ', 1, lungs; 2, peculiar yellow 
glands ; 3, 3, testicles. 
Plate VI. Dissected Song Sparrow, illustrating the sexes 
of the young-of-the-year, in autumn, as follows : — Fig. 1. A young 
male ( $) ', 1, lungs ; 2, 2, yellow glands ; 3, 3, testicles. Fig. 2. A 
young female ( 9 ) ; 1, 1, yellow glands ; 2, ovary; 3, lungs; 4, ovi- 
duct. 
Plate VII. Outline of Grouse, showing the position of the 
different parts, as follows : — a, the back ; b, rump ; c, upper tail- 
coverts ; d, under tail-coverts ; e, vent ; f, tibia ; g, tarsi ; h, breast ; 
i, side ; j, neck ; k, hind neck ; 1, abdomen ; m, feet ; n, throat. 
Plate VIII. Illustrates mounting Birds. — Figs. 1, 2. Arti- 
ficial body ; a, bone of leg ; b, wire bent ; c, wire clenched ; f, h, tail 
wire. Fig. 3. Mounted bird; a, perpendicular line, showing the 
position of the head compared with the feet and base of the stand ; 
b, b, wires for retaining the upper part of the wing in position ; c, c. 
wires for retaining the lower part of the wing in position ; e, e, wires 
for the tail ; d, showing the tail-feathers plaited ; f, stand. Fig. 4. 
Stand for mounting birds with the wings extended ; b, b, parallel 
wires ; c, wires bent ; a, block of wood for the bottom of the stand, 
Fig. .5. Head of Cedar-Bird, to illustrate the elevating of the crest ; 
g, cotton on the pin ; b, feathers of the crest in position bn the cotton. 
Plate IX. Illustrates mounting Mammals. 1. A, 
plank for supporting iron rods ; 8, iron rod for supporting head ; 14, 
cap, nut, and screw for fastening the end of the rod in the skull ; 
7, 7, 7, 7, iron rods to support the body ; 5, 6, 5, 6, caps, etc. for fastening 
the upper ends of the rods to the plank; 17, 17, 17, 17, caps, etc. for 
fastening the lower part of the rods to the stand (10) ; 15, wire for 
supporting the tail ; 16, 16, 16, 16, 16, 16, 16, 16, artificial sections of 
