432 



INDEX 



Anura, 6 



Aorta, dorsal, 290 



ventral, 290, 298 

 Aortic arches, 290, 298 

 Aponeuroses, 134 

 Appendages, free, 123 



paired, 112 

 Appendicular skeleton, no 

 Appendix vermiformis, 248 

 Apteria, 35 

 Aqueduct, 150 

 Aqueous humor, 218 

 Arachnoid membrane, 163 

 Arbor vitae, 1 73 

 Arcades of skull, 77 

 Archenteron, 10 

 Archicoele, 9 

 Archinephric duct, 339 

 Arch of aorta, 303 

 Archipallium, 160 

 Archipterygium, 124 

 Areolar tissue, 27 

 Argenteal layer, 217 

 Arm, 125 

 Arteries, 287, 298 

 Arterial ring, 305 



trunk, 290 

 Arthrodira, 7 

 Articular process, 49 



bone, 78 

 Articulations of skeleton, 42 

 Arytenoid cartilage, 270 

 Ascending aorta, 303 



tracts, 146 

 Asterospondylous, 58 

 Astragalus, 126 

 Atlas, 56 



Atrial chamber of gills, 256 

 Atrio-ventricular canal, 295 

 Atrium of heart, 290, 295 



of lungs, 279 



of nose, 209 

 Auditory bulla, 109 



meatus, 203 



nerve, 189 



organs, 197 



tube, 202 



vesicle, 197 

 Auricle, 295 

 Auricular muscles, 139 



nerve, 190, 191 

 Autostylic jaws, 79 



Aves, 6 



Axial skeleton, 48 



Axillary artery, 306 



vein, 314 

 Axis, 56 



cylinder, 24 

 Axon, 24 

 Azygos appendages, in 



vein, 327 



B 



Backbone, 48 

 Balanoglossus, 2 

 Baleen, 232 

 Barbs, 35 

 Barbules, 35 

 Basal bone, 92 



membrane, 214 

 Basalia, 112 

 Basibranchial, 72 

 Basilar artery, 305 



plate, 68 



process, 108 

 Basioccipital, 74 

 Basisphenoid, 74 

 Basitemporal plate, 105 

 Bell's law, 174 

 Bicuspids, 229 

 Bile, 248 



duct, 248 

 Birds, brains, 170 



circulation, 323 



gill-clefts, 253 



girdles, 117, 122 



intestine, 246 



limbs, 128 



limgs, 279 



lymph system, 332 



skin, 34 



skulls, 103 



sternum, 66 



stomach, 240 



thymus, 263 



thyreoid, 266 



tongue, 233 



trachea, 274 



urogenital organs, 365 



vertebras, 59 

 Bladder, air, 266 



urinary, 345, 371 

 Blastomeres, g 



