INDEX 



All numbers refer to pages — those in bold face type to pages with figures. 



A 



Abdominal, 29 



aorta, 392 



cavity, 353 



pores, 44, 404, 410, 411 



skin, 53, 54 



vein, 351, 352-356 

 Abducens nerve, 482, 483, 513, 523, 529, 



622, 625 

 Abductor digiti minimi, 283, 284 



hallucis, 284 



pollicis brevis, 283 

 longus, 282 

 Abomasum, 312 

 Abortion, 451 

 Absorption, 65, 314 



Acanthocephala (hook-headed worms), 9 

 Accessory duct, 326 



nerve, 482, 530, 626 

 Acetabulum, 250 



acetabular notch, 250 

 Achilles, tendon of, 276, 283 

 Acid, hydrochloric, 310 

 Acidity, 313 

 Acidosis, 447 

 Acinous, 140, 326 

 Acinus, 302, 327 

 Acoelomate, 30 

 Acoustic nerve, 482, 523, 529 

 Acrania, 20 

 Acraniote stage, 613 

 Acrodont, 186 

 Acromegaly, 463 

 Acromion, 247, 248 

 Actinia (n), 634 

 Adapidae, 33 

 Adaptation, 58 

 Adaptive changes, 80 



evolution, xiv 



mutation, xi 

 Addison's disease, 452 



Adductor brevis m., 283 



longus m.,. 283 



magnus m., 283 



pollicis m., 283 

 Adenoid tissue, 386 

 Adhesions, 322 

 Adhesive discs, 47 



organs, 617, 618 



papillae, 19 

 Adipose tissue, 158 

 Adrenal (suprarenal), 451-455 

 Adrenal artery, 377 

 Adrenal glands, 453, 454 



evolution of, 454 

 Adrenin (epinephrine), 453, 454, 536 

 Adult, 450 

 ^pyornis, 40, 43 

 Aerated (blood), 388, 389 

 Afferent arteries, 351 



nerve, 520, 

 "After-birth," 121 

 Agassiz, Louis, 62, 609 

 Air bladder (sac), 89, 328, 329, 344, 346 



breathers, 25 



tubes (tracheae), 14, 89, 223, 226, 338 

 Ala cinerea, 530 

 Alar plate, 542 

 Albino, 179 



Albumen, 38, 40, 41, 46, 55 

 Alcohol, 451 

 Algae, I 

 Alimentary canal, 7, 8, 9, 11, 12, 30, 244, 



648, 651, 659 

 Alisphenoid, 222 

 Allantoic (umbilical) artery, 53, 377, 393 



placenta, 27 



sac, 53, 54 



stalk, 317 



vein, 371, 371, 376, 379, 382, 384 

 Allantois, 52-56, 113, 114, 115, 118, 119, 



317 

 Alligator(s), Si> 52 

 AUis, 540 

 AUolobophora, 631 



6gi 



