INDEX 4iI 
Nightingale, 306, 353, 369 
Nostrils, 130 
Noto-chord, 280 ; 
Nucleated corpuscles, 74, 77 
CEsoPHAGUS, 62, 63, 
Oil gland, 384 
Olfactory lobes, 119 
Optic lobes, 119 
Ornithology, 394 
Ornithorhyncus, 33, 41, 48 
Ornithosaurians, 42-47 
Ornitho-scelidze, see Dinosaurs 
Osmosis, 64 
Ostrich, 25, 34, 37, 107, 114, 164, 
311, 383, 391 
Owl, 62, 127, 135, 324 
Oxidation, 93 
PAINTED SNIPE, 290, 311 
Pallas’s sandgrouse, 376 
Pancreas, 66 
Parallelogram of forces, 181 
Parrot, 128, 146, 163, 197 
Passerine birds (Passeriformes), 49, 
385 
Peacock, 312 
Pecten, 127 
Penguin, 145, 171 
Peptone, 64 
Perching, 166 
Physiology, 109 
Pigeon, 54, 152, 157, 248, 253, 
296, 322, 373 
Pineal Body, 119 
Piracy, 341 
Platypus, see Ornithorhyncus 
Plover, American golden, 357 
Population, Bird, 294, 365 
Postaxial, 6 
Preaxial, 6 
Pronation, 195 
Proventriculus, 64 
Ptarmigan, 158 
Pterodactyls, 42-47, 50 
Puffin, 86, 215 
Pylorus-magen, 66 
Python, incubating, 48 
RaTiTé, 383, 391 
Reason, 327 
Reflex action, 117, 327 
Reptiles, 74 
Respiration, 78-96 
Retina, 124, 126 
Rhea, 34, 107, 342, 392 
Robin, 365 
Rudiments, 30 
Ruffs, 310 
SALIVA, 61 
Scales, 34 
Sclerotic, 124 
Screamer, 83, 161, 306, 381 
Selection, natural, 53-59 — 
Sexual, 310-314 
Sight (see Eye), 130 
Skeletons of bird and lizard, 6-28 
Skin, 99-101 
Skua, 111, 341 
Smell, sense of, 119, 130 
Snake, 22, 23 
Snipe, 168, 309, 366, 372, 384 
Song (see Syrinx), 305, 317, 396 
Spinal cord, 116 
Spine of vertebra, 7, 8, 23 
Spleen, 77, 109 
Spurs, 154, 161 
Stomach, 64 
Stroke, phases of, 218 
Rate of, 214 
Short, 226 
Upstroke, 217 
Struthious birds (= the ostrich and 
its kin), sce Ratitee, Ostrich, &c. 
Supination, 195 
Swallow, 155, 248, 269, 334, 348, 
3, 365, 385 
Swan, 25 
Sweat-glands, 100 
Swift, 107, 155, -165, 225, 248 385 
Swim-bladder, 31, 97 
Swimming, 170 
Syrinx, 78, 136-141 
TAIL, 213, 248 
Teeth, 35, 39 
Temperature, 48 
regulation of, 98-105 
Tendons, 141-143, 166 
Trachea, 78, 140 
Trajectory of bird, 223 
