INDEX 



(Figures in italics designate pages on which illustrations occur) 



Abdomen, 90, 93, 106, 133, 134, 1U9 

 Abdominal pore, 190 

 Abiogenesis, 218-221 

 Abortion, infectious, 391 

 Absorption, 153, 154, 157, 158 

 Academy of Sciences, National, 424 

 Acoelomate, 101, 480 

 Acquired character, 285, 286, 374; 



See: Modifications 

 Actinophrys, 49 

 Adam's apple, 162 

 Adaptability, 343-348 

 Adaptation, 18, 26, 28, 56, 316-337, 



375-377, 384, 388, 405, 431, 445 

 Adaptive radiation, 320-324 

 Adrenal gland, 190, 198 

 Adrenaline, 198 

 Aedes, 393 

 Aerobe, 318 

 Afferent nerve, 208 

 African sleeping sickness, 341. 342, 



390, 407 

 Agassiz, 459, U60 

 Age, old, 25, 256-259 

 Ages, geological, 360, 363 

 Agriculture, 6, 342, 403-417, 422 

 Air bladder, 1U6 

 Albino, 291, 296, 367 

 Albumin, 21, 253 

 Alcohol, 286, 318, 42/ 

 Algae, 335-337 

 Alimentary canal, 65, 150-160, 168, 



180, 267-270 

 Allantois, 271, 272 

 Allelomorphs, 292, 293, 302, 308 

 Allen's theory, 225, 226 

 Alligator, 120, 121, 365 

 Allogromia, 4# 



Alternation of generations, 72, 234 

 Alternative characters, 288 

 Alveolus, 163, 164 

 Amblystoma, 118 

 Ambulacral groove, 84 

 Amino acid, 22, 33, 36, 151, 156 

 Ammonia, 41, 181 



Amnion, 193, 271, 272 



Amoeba, 10, 12, 15, 27, 28, 35-37, 



261, 344, 390, 477 

 Amoeboid movement, 27, 28, 238, 



342 

 Amphibia, 111, 111-119, U7, 173, 



359, 365; See: Frog 

 Amphineura, 86 

 Amphioxus, 110, 111, 145, 478 

 Amylase, 155, 156 

 Anabolism, 25; See: Metabolism 

 Anaerobe, 318 

 Analogy, 107, 216, 459 

 Anaphase, 240-242 

 Anatomy, 3, 4, 354-388, 451-454, 



457-459 

 Andalusian fowl, 298, 299 

 Animal, 35-37, 43, 46-56, 67-131; 



body, 98-109, 132-/49; coloration, 



324-329; number, 47, 66, 67, 349 

 Animal biology, 3 

 Annelida, 81, 82, 457, 480; See: 



Earthworm 

 Anopheles, 392, 393; See: Mosquito 

 Ant, 93, 336-339, 346 

 Anteater, 127, 321 

 Antelope, 321, 3U1, 342 

 Antenna, 93, 10U-106, 330, 331, 356; 



cleaner, 331, 332; comb, 331, 332 

 Antennule, 105, 106, 356 

 Anterior chamber of eye, 150 

 Anther, 33U 

 Anthozoa, 75-77 

 Anthrax, 390, 391 

 Anthropoidea, 426-45/ 

 Antibody, 342, 343 

 Antitoxin, 343 

 Antlers, 192 

 Anus, 80, 132, 159 

 Aorta, 174, 176, 185 

 Aortic arches, 173, 175; loop, 101, 102 

 Ape, 130, 131, 322, 556", 359, 367, 



426-431 

 Aphid, 338, 339, 375, 411, 4/4 

 Apopyle, 70 



515 



