488 
Eggs, 
of Hen, development of, 466; for 
embryonic study, 462; structure of, 
464 
of Hummingbird, 436; Jellyfish, 427; 
Junco, 434; Jilldeer Plover, 431, 
432; Mallard Duck, 447;  Mourn- 
ing Dove, 439; Murre, shape of, 
31 
arabe? laid by, average bird, 433; 
Doves, 440;  Game-birds, 438; 
Gulls, 436; Hawks, 440; Hum- 
mingbirds, 443; Jungle Fowl, 444; 
King Penguin, 435; Moas, 435; 
Nighthawk, 442; Ostrich, 433; 
Owl, 440; Parrots, 441; Peacock 
Pheasant, 440; Rhea, 433; Sea- 
birds, 435; Shore-birds, 436; Wad- 
ing birds, 438; Water-birds, 436, 
437, 438 
relation of number to danger, 433-444; 
relative size compared with bird, 
460, 461 
of reptiles, 428, salmon, 427; show- 
ing relation of orders, 452; skate, 
428, 429; snake, 429 
Egg-tooth, of embryo chick, 480; 
reptiles, 480 
Egret, crest of Snowy, 315, 322; neck 
curves of, 73; use of wing of, 350 
Embryo, 
aorta, 476, 478 
development of limbs, 474, 475; of 
girdles, 475; of three toes, 475 
drawing of third-day embryo, 469 
feathers of, 479, 480; twelve-day 
chick, 22; forty-day Ostrich, 479 
gastrula stage of, 466, 468; gill-clefts, 
476; hatching of, 480; hatching of 
egg-tooth of, 480; hatching of 
Ostrich Chicks, 481; illustrating 
evolution, 470, 471; limbs of, 97; 
lung in, 178, 179; method of study- 
ing, 462, 471; muscles of, 480; 
muscle-plates of, 69, 70; pineal 
eye in chick, 478, 479; precoracoid, 
475; respiration of, 476; ribs, 473, 
474; segmentation of Chick, 466, 
468; segmentation of frog, 465, 
466, 467; sixth-day chick com- 
pared with reptile and mammal, 
479; tarsus of, 99; teeth in tern, 
476; third day in egg, 463 
thirty-six hours, 472; brain in, 472; 
eyes, 472; false vertebrae, 472; 
heart, 472 
twelfth-day, 473 
Emeu, body-feathers of, 239; feather 
of, 36; lack of tail in, 402, 404 
Emeu-wren, tail of, 415 
Index 
Environment, relation of birds to, 480. 
482 
Epiclavicle of fish, 86 
Evolution, of bill of Flamingo, 235, 236; 
bill of Skimmer, 231, 232, 236; 
breast-bone, 79; Class of birds, 15; 
colour patterns, 58-61; embryo chick, 
470, 471; foot, 353, 358, 361; gill- 
arches, 114, 115; gizzard, 138; heart, 
180, 181; history of theories of, 12; 
lung, 178, 179, 180; Penguin’s wing, 
341; ribs, 78; shoulder-girdle, 86, 
87; skull, 104-106; tail, 398, 300, 
400, 402, 403; tree (of birds and 
reptiles), 10;  warblers, 361-367; 
wings, 91-97 
Eye, 
Apteryx, 254, 255, 256; compared 
with camera, 207, 208; iris of, 210 
lashes of Hornbill, 257; Ostrich, 257; 
Seriema, 257 
lids of, 214, 215; Brown Thrasher, 
212, 213; Woodcock, 221, 256 
mammals, 209, 254; nocturnal birds, 
254 
pineal eye in, embryo chick, 478, 479; 
child, 479; lizard, 477, 478; polly- 
wog, 479 
position of, in Dove, 252, 253, 254; 
Owl, 252, 253, 254 
structure of, 207-210; 
hour embryo, 472 
Expression of face of birds, 252 
thirty-six- 
F 
Falcon, Peregrine, see Duck Hawk. 
Family, habits of Warbler, Black-and- 
white Warbler, 366; Black-throated 
Green Warbler, 166; Magnolia, 366; 
Maryland Yellow-throat, 362; Myrtle 
Warbler, 364; Ovenbird, 366, 375; 
Pine Warbler, 366; Redstart, 363, 
364; Yellow Palm Warbler, 363; 
Water Thrushes, 364, 365; Worm- 
eating Warbler, 363 
Fat, of Penguins, 286; Petrels, 286 
Feather, aftershaft of, 36; barbicels of, 
32, 34; barbs of, 34; barbules of, 32, 
34; cells of, 34; divisions on wing, 
320; growth of Ostrich, 28; model 
of structure of, 33; pattern on, 58-61; 
structure of, 31-38 
Feathers, arrangement of, 38-40; in 
tail of Archopteryx, 398, 399 
400, 401; in modern bird, 399, 400 
of Cassowary, 338; colour of, 53-61; 
of Condor, 36, 336; development 
of, 17-38; downy condition of, 35; 
of embryo bird, 479, 480; of 
