INDEX 



Acadia, 134 



Acanthaspis, 167 



Acceleration, 16, 17, 108, 145, 149, 233, 

 252, 268, 279, 280 



Action and reaction, 5, 6, 12-23, 39. 53> 54. 

 58, 68, 69, 71, 77, 80, 88, 98, 100, 106, 

 no, 117, 118, 120, 142-145, 147, 150, 

 152, 154, 160, 231, 242, 244-246, 271, 

 279-283 



Adaptation, 7, 8, 10, 20, 23, 38, 46, 58, 143, 

 144, 151-159, 174, 208, 225, 232, 236, 

 239-249, 253-259. 262, 266, 273, 275, 

 277, 281, 282; see Adaptive radiation, 

 Convergence, Divergence, Food adapta- 

 tions, Habitat adaptations; alternate, 

 201, 203, 236, 240, 243; convergent, 155 

 (Fig.), 200 (Fig.), 207 (Fig.); reversed, 

 201, 203, 204, 236, 240, 241, 260 



Adaptive radiation, 89, 114, 118, 119, 121, 

 130, 131, 157-159, 168, 175, 180, 184, 

 186, 189, 191-194, 201, 222, 227, 236- 

 239, 259, 274 



Adirondacks, 100 



Adult, 106, III, 147 



Africa, 82, 125, 183, 188, 194-196, 217, 225, 

 236, 237, 241, 261, 263, 269; see South 



Agassiz, Louis, 152 



Aglaspidae, 124 



Air, 18, 22, 3s, 37, 45, 7o, 84, 105, 106; see 

 Atmosphere 



Aistopoda, 178 



Alabama, 260 



Alaska, 206 



Alberta, 222, 223 



Algae, 32, S3, 38, 45, 49, 5°, S3, 64, 66, 67, 

 80, 90, 91, 99, 101-104, 105; blue-green, 

 loi, 102, 285, 286, see Cyanophyceje; 

 earth-forming, 103; limestone-forming, 

 118, 137; rock-forming, 103 



Algomian, 50, 153 



Algonkian, 50, 85, 86, 102-104, 120, 153, 

 256 



Alligators, 186, 199 



AUosaurus, 213 (Fig.), 221. 



Alpine, 83 



Alps, 188, 255, 256 



Aluminum, 33, 34, 54 



Amalitzky, W., 191 



Amblypoda, 259 



America, 79, 164-166, 182, 190, 195, 237, 

 255, 266; see North, South 



Aminoacids, 86 



Amiskii'ia sagitliformis, 129 (Fig.) 



Ammonia, 68, 83, 86 



Ammonites, 130, 137-139 (Fig.), 181, 213, 

 291 



Ammonites siibradiatiis, 138, 139 (Fig.) 



Ammonium salts, 84, 85 



Ammonium sulphate, 82 



Amaha, 57, 112, 116, 290; Umax, 93 (Fig.); 

 proteus, 112 (Fig.) 



Amphibamiis, 178, 179 (Fig.) 



Amphibia, 131, 165, 172, 174, 177-183, 

 185, 186, 196, 292; see Amphibians 



Amphibians, 161, 163, 175, 177-183, 185, 

 190, 198-200, 210, 212, 231, 239, 246, 

 253, 260, 275; see Amphibia 



Amphioxus, 162 (Fig.), 168, 292; see Lance- 

 lets 



Anchisaurus, 211 (Fig.), 213, 216 (Fig.) 



Angiosperms, 108 



Angiiilla, 174 



Animals, 40, 41, 51, 53, 55, 56, 69, 70, 80, 

 91, 106-110, 285; air-breathing, 166, 185; 

 bipedal, 213, 216, 221, 224, 226, 227, 

 229; experiments on, 74-79, 116, 117, 

 247, 250, 251; predaceous, 162, 169, 181, 

 190, 234; quadrupedal, 210, 216, 217, 

 219, 220, 224 



Animikian, 50, 153 



Ankylosaiirus, 225 



Annulata, 118, 128 (Fig.), 130, 131, 291; 

 see Worms 



Anomodonts, 190, 191, 193 



Anomoepits, 211 (Fig.) 



Antarctic, 164, 166, 181, 185, 205 



Antarctica, 256 



Ant-eater, 259, 279; spiny, 235 (Fig.) 



Antelopes, 225, 266, 292 



307 



