INDEX 



Omission of the seldom-used glossary and reading lists has permitted much more 

 complete indexing than in the previous edition. Technical terms have been held to a 

 minimum throughout the book. Those used are explained by definition, context, or 

 illustration. Text references are in roman type, those to footnotes followed by n. 

 Illustrations accompanying text are not separately indexed, but if on other pages 

 are given in italic type. 



Absorption, intestinal, 71-72; 25 



by roots, 147-151 

 Acanthodian fishes, 426-427, 630 

 Acetylcholine, 108 

 Acorn worms, 422, 656 

 Acquired characters, 311, 319, 589 



in Lamarckian theory, 343, 344 

 Acromegaly, 128 

 Adaptation, 330, 355, 377 

 Adaptations, arboreal, 471-473 



to burrowing, 360, 378 



of embryos and larvae, 367, 368 



to flight, 358-359, 454, 455 



to grazing in horses, 465-469 



to land breeding, 438-439, 553 



to land life, in plants, 408-409 

 in vertebrates, 430-432, 546 



to plankton feeding, 551-552 



to running in horses, 464-469 



for seed dispersal, 382 

 Adaptive convergence, 378-379, 461; 360 

 Adaptive radiation, 377-378 



of amphibians, 432 



of marsupials, 379, 461 



of reptiles, 439-453 

 Addison's disease, 130 

 Adenosine triphosphate (ATP), 43 

 Adjustor neuron, 116; 117 

 Adrenal gland, 130-131; 127 

 Adrenalin (adrenine), 84, 96, 131 

 Adrenocorticotrophic hormone (ACTH), 



129 

 African group of mankind (see Negroids) 

 African Negro race, 523; 512, 524 

 Agglutinin, 101 



Agriculture, 533-535, 589-590; 530 

 Ainu race, 517-518; 512 

 Alfalou subrace, 503 

 Algae, 193-196, 406-407, 597-601 



blue-green, 406, 597, 599; 404 



brown, 407, 597, 601; 406 



Algae, green, 406-407, 597, 600; 194, 195, 

 405, 552 



history of, 402-403, 406-407 



multicellular, 195-196; 552, 599 



red, 407, 597, 601; 4O6 



reproduction in, 255-257 



unicellular, 193-195; 407, 600, 601 

 All-or-none rule, 44, 85, 112 

 Allantois, 252, 438, 553; 251, 439 

 Allele or allelomorph, 283, 299, 302, 314 

 Alleles, multiple, 316 



origin of, 314-316 

 Allergy, 102, 132 

 Alligators, 447, 661; 662 

 Alpine race, 517; 512, 516 

 Alternation of generations, in animals, 

 214-215 



in bryophytes, 257-259; 262 



in plants, 254; 262 



in pteridophytes, 259-262 



in spermatophytes, 268-276; 262 



in thallophytes, 256-257; 262 

 Alveolus, 74; 23, 76 

 American Indian race, 511, 521-522; 



512 

 Amino acids, 57, 63, 544 



synthesis of, in plants, 174, 542 

 Amnion, 252-253, 438, 553; 251, 489 

 Amniote egg, 438; 489 

 Amoeba, 178-179, 211, 632; 186 

 Amphiaster, 19, 216; 18 

 Amphibians, 631, 659, 661; 594 



origin and history of, 430-434 

 Amphioxus, 656 



development of, 233, 236-237; 234 

 Amplexus, 226-227; 223, 225 

 Amylopsin, 68, 70 

 Anabolism, 13 



Anaerobic metabolism in muscle, 44 

 Analogy, 355-356, 358-359; 860, 379 

 Anaphase, 19-21, 219; 18, 217 

 Anapsid reptiles, 439-442, 631 ; 692 



673 



