824 



Subject Index 



Ambystoma maculatum, 454 



tigrinum, 240, 445 

 Ameba, 140 



Ameloblast layer, 40, 42 

 Amia, 132 



Ammocoetes, 405, 414 

 Amnion, 241, 242, 244, 289, 290, 291, 292, 



293, 295, 408, 483 

 Amnion (ic) (amniotic) cavity, 290 



fluid, 295, 483 

 Amniota(es), 80, 280, 408, 409 

 arteries of, 626-629 

 lungs of, 618-621 

 Amphibia(n), 22, 44, 220, 222, 283, 287, 

 288, 409, 410, 442-461 

 circulatory system of, 64, 71, 72, 74, 77 

 classification of, 451-459 

 development of, 248, 249, 253-257, 



261, 262, 266, 278, 279 

 early, 459-461 

 evolution of, 461, 791, 792 

 fishes compared with, 459-461 

 heart of, 622, 624 

 larval stages of, 442, 443, 444, 445 

 morphology of, 442-461 

 muscles of, 91, 92, 95, 96, 97 

 nervous system of, 150, 151, 155, 159, 

 160, 164, 165, 173, 191, l').',, 207, 

 208, 210, 214 

 reproductive system of, 80, 81, 88, 233, 



234, 236, 238-241, 244, 246 

 respiratory system of, 59, 60, 61, 445, 



447 

 skeleton of, 101, 105, 115, 121, 1l'l\ 128, 



132, 134, 138 

 tailed, 452 

 teeth of, 52, 53, 55 



urinogenital system of, 79, 80, 81, 85, 

 88 

 Amphicoelous centrum, 106 

 Amphioxus, 11, 18, 80, 90, 152, 194, 228, 

 234, 394, 401, 402, 403, 404, 405 

 development of, 247, 248, 250, 252, 253, 

 255, 256, 258, 259, 260, 261, 262 

 266, 267, 268, 269, 270, 271 

 Amphiplatyan centrum, 106 

 Amphisbaenia, 486 

 Amphiuma, 452 

 Ampullae, 208, 211 

 Anal glands, 663-667 

 Analogy and homology, 360-365 

 Anamnia (anamniota), 408, 409 

 Anapsid skull, 501, 502 

 Anatomy, 302 



comparative, 5, 789-791 

 aim of, 355-384 

 history of, 333-354 

 method of, 355-384 

 medieval, 335-338 

 prescientific, 333 

 Ancestor, common, 348, 366, 368 

 Angular, 126 

 Animal hemisphere, 250, 252, 257 



pole, 235, 247, 248, 249, 250, 252, 254 

 Ankle, 131, 132 



Ankylosed teeth, 46, 47 

 Annelid, 142, 197 



Anomalies, somatic and visceral, 213 2 1 ."> 

 Ano-preputial glands, 665 

 Anseriformes, 546, 556 

 Antbears, 743 

 Anteaters, 56, 743 

 Cape, 745 

 great, 743 

 lesser, 743, 744 

 scaly, 745 



spiny, 236, 238, 242, 276, 384 

 Antebrachium (forearm), 94, 95, 131 

 Antelope (s), 757, 759 



American, 757 

 Anterior, 12, 13 

 crescent, 262 

 Anthropoidea, 770, 771 

 Antilocapra, 757 

 Antilocapridae, 757 

 Antlers, 573, 576 

 Antrum, 605 



of Highmore, 677 

 Anura(n), 70, 150, 239, 454-458 

 Anus, 25, 107, 268, 270, 274 

 Aorta, 6, 64, 67, 71, 107, 277, 279 



dorsal, 6, 175, 217, 272, 275 

 Aortic arches, 6, 64, 67, 69, 73, 107, 021. 

 624, 627 

 trunk, 625, 629 

 Apes, 229, 233 



great, 772 

 Apoda, 239, 458, 459 

 ApptMidage(s), 92 

 locomotor, 17, 154 

 of mammals, 581, 582, 583 

 median, 134, 135 

 paired, 128-134, 172, 173, 383, 447, 



467, 468 

 pectoral, 17, 129 

 pelvic, 17, 129, 130 

 pentadactyl, 407 

 Appendicular muscles, 92-97 

 Appendicularia, 401 



furcata, 400 

 Appendix, vermiform, 641 

 Apteria, 508 

 Apterygiformes, 544 

 Apteryx, 544 



australis, 546 

 Aquatic adaptation, 369, 781 

 birds, 556 



mammals, 678, 687, 800 

 vertebrates, 408, 636 

 Aqueduct of Sylvius, 151 

 Aqueous humor, 202, 203 

 Arachnoid, 191, 192 



spaces, 192 

 Arbor vitae, 713 

 Arboreal adaptations, 801 

 Arborization, terminal, 310 

 Arc, nervous, 142 

 reflex, 141, 174 

 Arch(es), 124 



aortic, 6, 64, 67, 69, 73, 107, 621, 624, 627 



