viii 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.” 
Pirate 1V. ILitustrRaTes PREPARING Skins — Figs. 1 and 2. 
Corrugated board, used in drying skins; d, skin on the board, in the 
proper position. 2%. 3. A “skin” prepared for scientitic use; @, la- 
bel, on which is marked the number and sex. 
Pirate V. Dissecrep Sone Sparrow ( Melospiza melodia, Baird), 
illustrating the sexes in the breeding season, as follows :— Frg. 1. An 
adult female (9); 1,1, peculiar yellow glands; 2, ovary; 3, oviduct ; 
4,lungs, Fig. 2. An adult male ( ¢); 1, lungs; 2, peculiar yellow 
glands; 3, 3, testicles. 
Prate VI. Dissrectep Sone Sparrow, illustrating the sexes 
of the young-of-the-year, in autumn, as follows: —/ig 1. A young 
male ( f); 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. 
¥ 
Puate VII. Ovuriixe or Grouse, showing the position of the 
different parts, as follows:—a, the back; b, ramp; c, upper tail- 
coverts; d, under tail-coverts ; e, vent; f, tibia; @, tarsi; h, breast; 
i, side; j, neck; k, hind neck; |, abdomen; m, feet; u, throat. 
Prate VIIL Ititesrrates mountine Birps. — Figs. 1,2. Arti- 
ficial body ; a, bone of leg; b, wire bent; c, wire clenched; f, h, toil 
wire. fg. 8. Mounted bird; a, perpendicular line, showing the 
position of the head compared with the feet and bise of the stand ; 
b, b, wires for retaining the upper part of the wing in position ; ¢, ¢& 
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 ; v, wires bent; a, block of wood for the bottom of the stand, 
Fig. 5. Head of Cedar-Bird, to illustrate the elevacing of the crest, 
g, cotton on the pin; b, fcathers of the crest in position on the cotton. 
Prats IX. I Liustrates mounting MamMats.—F%q. 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, ete. for fastening 
the upper ends of the rods to the plank; 17, 17, 17. 17, cans, ete. 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, artiiicial sections of 
