vm 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. Illustkates peepabing 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 Spaeeow [Melospiza melodia, Baird), 

 illustrating the sexes in the breeding season, as follows : — Fig. 1 . An 

 adult female ( 9 ) ; 1, 1, peculiar yellow glands ; 2, ovary; 3, oviduct; 

 4, lungs. Fig. 2. An adult male ( (J) ; 1, lungs; 2, peculiar yellow 

 glands ; 3, 3, testicles. 



Plate VI. Dissected Song Spaeeow, 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 ) > 1j 1> yellow glands ; 2, ovary; 3, lungs; 4, ovi- 

 duct. 



Plate VII. Outline op Geouse, 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 hent ; 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 r»taining 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 on the cotton. 



Plate IX. Illustrates mounting Mammals. — Fig. 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 



