Atlanto-axial articulation of horse, 176
ligament, inferior, 176
superior, 176
Atlanto-occipital articulation, 176
membrane, inferior, 176
superior, 176
Atlas, 33, 34
of dog, 150
of ox, 112
of pig, 147
Atrio-ventricular groove of heart, 527
opening in left atrium, 530
in right atrium, 530
left, of ventricle, 533
right, of ventricle, 531
Atrium of heart, 529
left, 530
right, 529
openings in, 529
sinus of, 529
ventriculi of ox, 393
Auditory canal, external, 747, 748
meatus, external, 56, 748
internal, 56, 759
nerve, 686
ossicles, 754
process, external, 56, 67
tube, 755