490 



Index 



gastrula of egg of, 466; segmentation 

 of egg ot, 467; used as food, 157 



G 



Gallinule, foot of, 385, 386, 387 

 Game-birds number of eggs laid by, 438 

 Gannet, bill of, 227, 228 

 Gastrula, 466, 468; compared with 



sponge, 469, 470 

 Gill-arches, of chick, 114; evolution of, 



114, 115; ultimate distribution of , in 



chick, 114, 115 

 Gill-bars of shark, 113 

 Gill-basket of lamprey, 112 

 Gill-clefts in Amphioxus, 473; embryo 



chick, 476; fishes, 473 

 Giraffe, neck-vertebrae of, compared with 



those of bird, 73, 75 



Girdles, embryonic development of, 475 



Gizzard, 134-140; change in structure 



of, 137, 138; function of, 135; of 



Fruit Pigeons, 138; of Hornbills, 139, 



140 



stones of Cassowary, 136; crocodiles, 

 138; extinct Moas, 136, 137 



of pigeon shown by X-ray, 63 

 Glottis of nestling Robin, 166; Peli- 

 can, 1 66 



Goat-sucker, West African, wing orna- 

 ments of, 349 



Goldfinch, flight of, 329; tongue of, 125 

 Goose, Canada, embryo of, 474; colour 



of eggs of, 448; muscle of skin in, 188; 



sense of hearing in, 216; Spur-wing, 



wing of, 346, 347; use of wing in 



young Canada, 322 

 Crackle, tail of Boat-tailed, 418 

 Grebe, eggs of, 432; flight of, 341; foot 



of, 391 

 Grouse, Black, moult of, 48; colour of 



eggs of, 447; Ruffed, ruff of, 277; 



Ruffed, use of wing of, 547; toes of 



Ruffed, 380, 381 

 Guinea Fowl, Vulturine, evolution of 



colour pattern on wings of, 58, 59, 



61 



Gullet, of Cormorant, 133; crocodile, 134 

 Gull, change in gizzard of, 137, 138; 

 flight of, 328; food of, 161; Her- 

 ring, wing of, 328 



Ivory, aggressive coloration in, 309, 

 311; protective coloration in 309, 



3" 



Laughing, nest of, 437; protective 

 coloration of, 309, 312; number of 

 eggs laid by, 436 

 Gyrfalcon, aggressive coloration in, 309, 



312 



H 



Hatching of embryo Chick, 480; Os- 

 trich, 481 



Hawk Duck, food of, 158; head of, 211; 

 feet of Rough-legged, 389; mimicked 

 by Cuckoo, 311, 312; number of 

 eggs laid by, 440; skull of, compared 

 with that of Heron, 199, 200 



Heads and necks, 252-284 



Head of, Adjutant, 276: Apteryx, 254; 

 256; Barn Owl, 253; Bell-bird, 273, 

 Caracara, 271, 272; Eared Pheasant, 

 267, 268; Condor, 271; Crowned 

 Crane, 252, 265; Domestic Cock, 274; 

 Dove, 253; Duck Hawk, 211; Java 

 Peacock, 258; King Vulture, 272, 

 273; Seriema, 257; Sloth, 210; 

 Wild Turkey, 273, 275 



Heart, beats of that of bird, 182; 

 chambers of, 182, 184; of croco- 

 dile, 181; of fish, 181; of embryo 

 36 hours old, 472; evolution of, 180, 

 181; position of, in vertebrates, 181 



Helmet of Cassowary, 275, 288; Horn- 

 bill, 278 



Hemispheres, cerebral, 200 



Hen, abnormal number of eggs laid by 

 domestic, 444 



Heron, a still hunter, 156; Boat-billed, 

 237, 238; body of, 386; cause of 

 downiness in feather of, 35; colony 

 of Great Blue, 450; colour of eggs 

 of, 448; comb on toe of, 387, 388; 

 divisions of feathers in wing of young 

 of, 320; Great Blue, 237; in sleep, 

 344; Night, 237; Night, crest of, 

 259; skull of, compared with that 

 of Hawk; 199, 200; standing on 

 toes, 101; tail of Green, 413; use 

 of wing in young Green, 323; wing 

 of Great White, 321 



Hesperornis, habits and structure, 3-6; 

 restoration of, Frontispiece 



Hoatzin, clavicles of, 86; crop of, 130, 

 131; keel repressed by crop, 132 



Honey Creeper, tongue of, 127, 129 



Hornbill, casque of, 275, 278; eye- 

 lashes of, 257; feeding mate from 

 its gizzard, 137, 138 



Horse, toes of, 358 



Hudson, quoted, 329, 333 



Huia Bird, bill of, 248, 249, 250 



Humerus, 92, 96 



Humidity, effect on plumage of, Bob 

 White, 293, 295; Song Sparrow, 292, 

 295; White-throated Sparrow, 291, 

 294; Wood Thrush, 294 



Hummingbird, Anna, nest of, 443; eggs 

 of, 443; bills of, 244, 245, 246, 247, 



