464 



INDEX 



Anther, 255, 256 



Antheridium, 2^3, 255 



Antibodies, 83-85 



Antitoxin, 83-86 



Ants, 360 



Anus, 274 



Aorta, 181 



Apes, 122, 404-406 



Aphid, 263 



Appendicular skeleton, I4g, 151 



Applied Biology, 431 



Arachnida, 113, 114, 125, 167, 357 



Archegonium, 25J-255 



Archenteron, 147, 266, 26'j-268 



Archeopteryx, 403-405 



Aristotle, 421 



Armadillo, 121 



Arteries, iSo-iSj 



Arthropod digestive system, iss 



Arthropod respiratory systems, 166, j6y 



Arthropoda, 112, 113, 125, 142, 143, 



155, 167, 196, 214, 215, 249, 263, 



335, 357> 401, 402, 403 

 Artificial immunity, 85 

 Artificial selection, 390 

 Ascaris, 10$ 



Asexual reproduction, 75-76 

 Assimilation, 57 

 Asteroidea, 108, 109 

 Asters, 307-308 

 Astigmatism, 228 

 Astronomy, 2 

 Atom, 7 



Atria, 779, 180, 181 

 Attenuated bacteria, 85 

 Auditory nerve, 223, 230, 231 

 Aurelia, 102 

 Auricles, 180 

 Autocatalysis, 80 



Autonomic nervous system, 215, 216 

 Autosomes, 309 



Aves, 119, 120, 125. See also Bird. 

 Axial skeleton, 149, 151 

 Axone, 210 

 Aye-aye, 122 



Bacillus, 81, 82 

 Back cross, 394 



Bacteremia, 82, 83 



Bacteria, 43, 44, 73, 76, 57-87 



Bacterolysins, 83 



Bailer, 767 



Balanoglossus, 775 



Balfour, 424 



Barriers, 414 



Base, 12 



Bateson, 424 



Bats, 121 



Beaks, 145 



Bears, 122 



Beavers, 121 



Bees, 360-J6/ 



Beetles, 55.5-359 



Behavior, 53, 370, 375-377 



Beriberi, 292 



Bernard, 425 



Bilateral symmetry, 134, 135 



Bile, 163, 165 



Binary fission, 64, 6g, 76 



Biogenetic Law, 281, 411 



Biology, 2, 26, 27, 39, 43, 421-438 



Bipolar neurone, 27/ 



Bird brain, 279 



Bird digestive system, 470 



Bird excretory system, 79^ 



Bird forelimb bones, 141 



Bird heart, 779, 409 



Bird reproductive system, 795 



Bird's egg, 26g 



Birds, 119, 720, 747, 170, 196, 268, 



269. 309, 349» 350. 351, 403 

 Bladder-worm, 365 

 Blastocoele, 130, 131 , 265-268 

 Blastopore, 7jo, 266, 268 

 Blastula, 750, 265-267 

 Bleeders, 175 

 Blood, 109, 173-178, 202 

 Blood fluke, 106 

 Blood platelets, 175 

 Blood pressure, 182 

 Body cavity, 135, 757, 138 

 Bombardier beetles, 355 

 Bone, 147, 148 

 Book lungs, 112, 767, 357 

 Brachiopoda, 107, 108, 401 

 Breathing, 59 



