Subject Index 



82E 



Arch(es) — (Continued) 



branchial, 118, 120, 122, 126, 166 



frontal, 122, 124 



hemal, 106, 107, 114 



hyoid, 118, 122, 126, 166, 605 



mandibular, 118, 122, 125, 127, 605 



neural, 106, 107, 111, 112, 279, 413, 414 



occipital, 112, 122, 124 



parietal, 122, 124 



of skull, 377 



thoracic, 586 



visceral, 96, 107, 115, 118, 119, 122t, 136, 

 138, 605, 607, 623, 695 



zygomatic, 128, 601 

 Archaeopteryx, 539 

 Archaeornithes, 543, 553 

 Archenteric cavity, 274 

 Archenteron, 252, 254, 255, 256, 259, 261, 



262, 268, 296 

 Archetype, 340, 348 

 Arcuate, veins, 86 

 Ardea herodias, 549 

 Area opaca, 263 



pellucida, 262 

 Areolar tissue, 321 

 Arm, 94 

 Armadillo (s), 44, 100, 101, 598, 743, 745 



giant, 743 



nine-banded, 745 

 Arteries, 63 



allantoic, 293 



arrangement of, 626-629 



branchial, 64, 67 



carotid, 67, 68, 625 

 external, 71 

 internal, 6, 70, 71 



caudal, 64, 68, 74 



celiac, 68 



ciliary, 203 



hepatic, 32, 64 



iliac, 64, 68, 71, 74 



innominate, 625 



interlobar, 86 



mesenteric, 64, 68, 71 



ovarian, 68 



pulmonary, 64, 68, 69, 71 



renal, 68, 71, 78, 86 



retinal, 203 



spermatic, 68, 652 



stapedial, 694 



structure of, 65, 67 



subclavian, 68, 625, 626 



vertebral, 592 

 Arthrodira, 421 

 Arthropod, 101, 141 

 Articular, 126, 128, 563, 695 

 Artiodactyl symmetry, 751, 752 

 Artiodactyla, 751, 754-757, 778, 779 

 Arytenoids, 614 

 Ascending fibers, 154, 169, 170 

 Ascidia(n), 394, 397 

 Ass, 752 

 Association cells, 170 



neurons, 141. 184 



tracts, 717 



Astroscopus, 439, 440 



Ateliotic dwarf, 226 



Atlas, 4, 109, 110, 111, 596 



Atresia, 645 



Atrial cavity, 396, 397, 400, 102 



Atriopore, 402 



Atrioventricular valves, 65, 622 



Atrium (a) (auricle), 64, 65, 67, 68, 69, 71, 



616 

 Auchenia, 758 

 Auditory cells, 196 

 meatus, 534 



nerve (acoustic nerve), 166, 692, 715 

 passage, 693 

 Auerbach, plexus of, 174 

 Augmentative homology, 362 

 Auk(s), 546, 556 

 great, 551, 556 

 Auricle(s) (atrium), 64, 65, 67, 68, 69, 71, 



616 

 Auricula, 696 

 Auricular muscles, 98 

 Australopithecus africanus, 771 

 Autonomic cord, 176 



ganglions, 172, 173-179, 177, 215, 217, 



219 

 nerves, distribution of, 183-186 



functional components of, 179-183, 

 180 

 neurons, 186, 187 



system, 159, 173-191, 176, 178, 181, 272 

 antagonistic actions of, 187-189 

 cervical division of, 187 

 cranial division of, 187 

 craniosacral (parasympathetic) di- 

 vision of, 187, 218 

 distribution of, 



craniosacral, 189, 190 

 thoracolumbar, 189, 190, 218 

 effectors of, 188 

 functions of, 187-191 

 sacral division of, 187 

 stimulation by, 



craniosacral, 188, 189 

 thoracolumbar, 188, 189 

 thoracolumbar (sympathetic) divi- 

 sion of, 187, 218 

 Aves, 503-558 (see Birds) 

 Axial skeleton, 136-138, 271 

 Axis, 596 



coelomic, 136, 137 

 dorsal-parietal, 138 

 mechanical, 12, 104, 112, 136 

 notochordal, 104-106, 137, 138 

 physiologic, 136 

 skeletal, 136-138, 137 

 sternal, 137, 138 

 structural, 136 

 ventral, 138 

 vertebral, 133, 134, 138 

 visceral, 136, 137, 138 

 Axolotyl, 240, 445 

 Axon, 140, 141, 142, 316 (see also Neurite 



and Neuraxon) 

 Azygos veins, 66, 71, 73 



