INDEX 



Note. — References to pages on which a figure appears are in bold face type. However, if a 

 reference covers two or more pages, no indication of figures is given. Any outstanding reference 

 in the text, when occurring among several, is in italics. If two or more references to the same 

 page exist the page number is not duplicated. 



Abalone, 220 



.\bdomen, crayfish, 250, 251 

 insect, 272, 275 

 spider, 296 

 Abdominal cavity, 317 

 Abiogenesis, 205 



Abnormalities, inheritance of, 536 

 .\bomasum, 416 

 Abscess, 490 



Absorption, 32-34, 65, 102, 131, 138, 161, 167, 

 168, 177, 196, 230, 246, 311, 323, 339, 439, 461 

 Abundance rhythms, 482 

 Acanthias, 338 

 Acanthocephala, 177, 181 

 Accommodation, 332-333, 395 

 Accretion, 17 

 Acetabulum, 321 

 Acidity, 187, 479 

 Acids, 8 



Acinous glands, 440 

 Acipenser ruhicundus, 345 

 Acontia, 145, 146 

 Acquired characters, inheritance of, 517, 521, 



536 

 Acquired immunity, 491 

 AcTopora, 162 



Actinosphaerium eichhorni, 81 



Action pattern, 472 



Adambulacral plate, 193 



Adaptation and adaptations, 166, 170, 201, 337, 

 347, 357, 359-362, 375-377, 382, 393, ,398, 

 401, 416, 417, 455, 460, 463, 472, 479, 483, 

 484, 487, 489, 490, 492, 501, 525 



Adelochorda, 308 



Adhesive papillae, tunicate, 312 



Adjustment (see Adaptation) 



Adjuster, 163, 238, 239, 327, 468, 470 



Adolescence, 43, 44, 4.32-434 



Adrenal bodies, 367, 464, 466 



Aedes, 287 



Aeolosoma, 244, 248 



Aepyornis, 396, 506 



Aerial types, 484 



Aeronautic spiders, 299 



Afferent fiber, 239 



Afferent impulse, 163 



Afferent path, 238 



Afterbirth, 421 



Aftershaft, 392 



Age immunity, 490 

 Ages, geological, 512 

 Air bladder, 344, 346, 348-349 

 Air sacs, 276, 394, 399 

 Albumen, egg, 376 

 Alder flycatcher, 481 



AUmentary canal, 103, 175-179, 182, 183, 185- 

 188, 195, 200, 206, 210, 212, 219, 2,30, 232, 

 242, 245-246, 253, 2.54, 276, 277, 297, 298, 

 304, 310, 311, 314, 317, 321-323, 339, 350-361, 

 372, 393, 394, 408, 416, 438^39, 460-461, 

 544-545, 547 

 Alkalinity, 479 

 Allantoic cavity, 377 

 Allantoic placenta, 412, 420 

 Allantoic stalk, 377 

 Allantoic vessels, 378 

 AUantois, 375, 377-378, 418-420 

 Allelomorphs, 528 

 Allergy, 489, 493 



brain, 381 

 Alligator gar, 345 

 Alligator mississippiensis, 387 

 Alligators, 380, 387-389 

 Alligators brain, 381 



Alternation of generations, 106, 150-151, 313 

 Altitude, effect on distribution, 502-503 

 Altrieial young, 404 

 Alveolar connective tissue, 99 

 Alveolar structure of protoplasm, 22 

 Alveoli, lung, 364, 441 

 -■Xmber, fossils, 510 

 Ambergris, 421 

 Ambulacral groove, 192 

 Ambulacral plates, 193, 203 

 Ambulacral pores, 193 

 Ambystoma, 374 

 Amhystoma tigrinum, 366 

 Ameba, 6.3-68, 82, 86, 493 



fission, 67 



locomotion, 66 



metabolism, 32 



sporulation, 67 

 Amebic dysentery, 87 

 Amebocytes, 196, 442, 466 



Ameboid cells, 131, 324, 350, 368, 440, 462, 490 

 Ameboid movement, 466 

 Ametabola, 278, 279 

 Amino acids, 461 ; absorption, 34 

 Amitosis, 49 

 Ammocoetes, 336 



587 



