INDEX 



This index is intended to serve as a Glossary as well. The 

 page on which a term is defined is indicated in boldface 

 type. 



Aardvark, 494 



Abalone, 251 



Abducens nerve, 417 



Abduction, 402 



Abomasum, 519 



Absorption, 524 



Abyssal zone, 795 



Acanthocephala. 232, 834 



Acanthodes, 432 



Acanthopterygii, 839 



Acara, 835 



Accessory respiratory organs, 530 



Accipiter, 841 



Accommodation, 579 



Acetabularia, 35 



Acetabulum, 401 



Acetoacetic acid, 616 



Acetylcholine, 106, 587, 596 



Acetyl coenzyme A, 72, 619 



Aciculum, 273 



Acid. 23 



Acoela, 213, 833 



Acorn worms, 142 



Acoustic nerve, 417 



Acoustico-lateralis area, 582 



Acquired characters, inheritance of, 690 



Acromegaly, 624 



Acrothoracica, 836 



ACTH, 625 



Actin, 44 



Actinaria, 833 



Actinopterygii, 440, 839 



Action potential, 101, 585 



Active reabsorption, 564 



Active transport, 45 



Actomyosin, 98, 99 



Adaptation(s). 16, 781-797 



color, 785 



interspecific, 787 



Adaptation(s), physiologic and chemical, 

 784 



structural, 784 

 Adaptive con\ergence, 783 

 Adaptive cn/ymes, 134 

 Adaptive radiation, 442, 782 

 Addison. 1 homas, 606 

 Addisons disease. 619 

 Adduction, 402 



Adenosine triphosphate, 67, 71 

 Adhesive glands, 204 

 Adrenal cortex, 617 

 Adrenal glands. 411, 616 

 Adrenal medulla, 617 

 Adrenocorticotropic hormone, 625 

 Adrenogenital syndrome, 620 

 Aeolosoma, 281. 835 

 Aestivation, 448, 762 

 Afferent neurons. 588 

 African eye worm, 811 

 African sleeping sickness, 809 

 After-birth. 573 

 Aftershaft, 471 

 Age of rocks, method oi measuring, 



720 

 Agglutination, 542 

 Agglutinins, 544 

 Agglutinogens, 544 

 Aggregations, animal, 767 

 Aglaspida, 835 

 Agnatha, 389, 427, 839 

 Agriculture, 822 

 Air sacs, 472, 477 

 Airstream, 468 

 Alarm response, 274, 775 

 Albatrosses, 480 

 Albinism, 683 

 Albumin, 455, 538 

 Alcaptonuria, 688 

 Alcyonarians, 197, 833 

 Aldosterone, 619 



849 



