4lo 
Flight—costinued 
Gliding, 190-193 
Horizontal, 180, 224 
Long distance, 224 
Soaring, 242 
Steering, 248 
Stopping, 208, 252 
in troops, 230 
Upward, 226, 239 
Varieties of, 397 
Velocity, 268 
in wake of ship, 245 
Wind and flight (see Wind) 232 
_ ~248 
Flying machines, 267 
Foot, 164-166 
Force exerted by bird, 259 
Frigate bird, 225 
GANNET, 83, 107, 131, 163, 164, 
202, 225, 291 
Geographical distribution, 377 
Gill-arches, 279-284 
Gizzard, 39, 64 
Glottis, 78 
Goose, 156, 158, 197 
Gravity, centre of, 224, 254 
Specific, 106 
Gullet, 62, 63 
Gulls, 49, 107, 241, 244, 386 
Black-headed, 160 
HAMOGLOBIN, 76 
Hallux, 166 
Hatteria lizard, 7, 16, 17 
Hawk, 66 
Heart, 68-74, 282-285 
of crocodile, 285 
of fish, 278 
Heligoland, 348 
Hibernation, 348 
Hoatzin, 43, 62, 286-290 
Homing faculty, 373 
Homology, 30 
Hornbill, 83, 107, 109, 111, 114 
Humming bird, 74, 162 
INSTINCT, 327 (see Table of Con- 
tents, p. xv) 
Tris, 124, 127, 129, 130 
INDEX 
JOINTS, 11, 22, 23, 194-196 
KIDNEYS, 102, 115 
Kite, the bird a, 233 
Knot, 160, 352 
LACTEALS, 67 
Larynx, 78 
Lens, 124 
Lepidosiren, 97 
Levers, 173, 174 
Ligaments, 144 
Elastic, 198, 199, 213 
Linnet, 159, 160 
Liver, 66, 67 
Lizard, 6-28, 37 
Lungs, 79, 80, 93, 94, 97 
Lymphatics, 71, 77 
MACULA LUTEA, 125, 128 
Marrow, 77, 82, 105-115 
Medulla oblongata, 103, 121 
Membrana semilunaris, 138 
Migrants and residents, 366 
Migration, 339, 348-378 (see Table 
of Contents, p. xv) 
Of fish, 352 
Unpaired birds, 363 
Moulting, 34, 155-160, 307, 364 
Muscle, 141-143, 247 
Muscles, ambiens, 169 
Finger, 209 
Flexor carpi ulnaris, 199, 201 
Inter-costal, 87, 90, 91, 93 
Latissimus dorsi, 89, 90, 92, 
257 
Pectoral, elevator, 206, 208 
Great (or depressor), 
205, 206, 211 
Third, 204, 207 
Pectorals, weight of, 211, 265 
Triceps, 200, 209 
Museums, 401 
NECK, 25 
Nerves, 116 
Optic, 125 
Sympathetic, 116 
Vasomotor, 103, 104 
Nest-building, 334-337 
Nesting-places, 355, 367 
