INDEX 



409 



Bones — continued 

 Ribs, 16, 25 



Scapula, 14-, 50, 83, 197 

 Shoulder-blade, see Scapula 

 Skull, 19-22 

 Squamosal, 33 

 Sternum, 13, 14, 50 

 Supra-scapula, 14 

 Tarso-metatarsus, iS 

 Thigh-bone, see Femur 

 Tibia, 7, 9, 16, 17 

 Tibio-tarsus, iS 

 Ulna, 6, 7, 8, IO 

 Uncinate processes, 16, 40 

 Upper-arm bone, see Humerus. 

 Vertebrae, 21, 23, 32, 38, 83 

 Vertebral column, 22-26, 251, 



255 

 Brain, 117-121, 280 

 Breathing, 78-96 

 Bronchi, 78 

 Bullfinch, 139, S33 



Capillaries, 69 



Carinatne, 383, 391 



Cartilage, 14 



Cassowary, 74, 149, 161, 302 



Cerebellum, 118, 280 



Cerebral hemispheres, 117, 280 



Chalazoe, 276 



Choroid, 126 



Chyle, 71 



Circulation, 68-72 



of fish, 278 

 Classification, 379-390 

 Claws, 37, 50 

 Cochlea, 133 

 Cold-blooded animals, 48, 96, 104, 



105 

 Coloration, 297-320 



of e gg s > 3 21 



of eye, 130 



Patterns, 302 



Protective, 304, 315 



Sexual, 305 



Variety, 297-30 1 

 Colour, change of, without moult- 

 ing, 159 

 Colours, objective and subjective, 



298 

 Condor, 119, 239 



( Conduction, 100, 101 



Condyle, 31 



Connecting links 41 



Cormorant 63, 66, 107, 164, 171, 



227, 307, 400 

 Cornea, 124 

 Corpuscles, see Blood 

 Correlated variation, 57, 314 

 Corti, organ of, 134, 343 

 Crocodile, 39, 86, 170, 284 

 Crop, 62, 63, 287 

 Crow, 404 

 Cuckoo, 155, 165, 329, 337, 386 



Darter, 66, 171 

 Death-feigning, 343 

 Diaphragm, 84-86 

 Digestive apparatus, 60-68 

 Digits, 9, 18, 42-46, 50 

 Dinosaurs, 47, 51 

 Divers, 107, 108, 239 

 Duck, 156, 162, 225, 366 

 Duodenum, 66 



Eagle, nr, 197, 292 

 Ear, 131-136 



Egg, 277 



Eggs, coloration of, 321 



of guillemot, 325 

 Egg-tooth, 278 

 Embryo, 77, 275-2S5 

 Emeu, 43, 149, 343 

 Epiglottis, 78 

 Epiphyses, 32 

 Eustachian tubes, 134 

 Evaporation, 99-301 

 Eye, 119, 121-131 



Feathers, 144-154 



Contour, 152 



"Downs," 146 



Elasticity of, 202 



Filoplumes, 146 



Hackles, 314 



Nestling "downs," 150 



Powder-down, 146 



Rectrices, 153, 214 



Remiges, 152, 202 

 Flight, 173-274 



Force exerted in, 259 



