Sphincter, 211, 213
ani externus of horse, 371
internus of horse, 371
cardiac, of horse, 359
of bladder of horse, 476
of mammary gland of cow, 521
of mare, 516
of uterus of mare, 513
pupillæ, 744
pylori of horse, 358, 359
Spina furcæ ungulæ, 767
helicis of dog, 779
Spinal accessory nerve, 690
of ox, 717
arachnoidea, 647
cord of dog, 724
of horse, 648
of ox, 715
of pig, 720
tracts of, 652
ganglion, 692
nerves of dog, 730
of horse, 692
of ox, 717
of pig, 723
root of fifth nerve, 658
veins, 543
Spinalis et semispinalis muscle of pig, 313
muscle of horse, 233
Spine, hæmal, 25
ischiatic, of horse, 94, 95
of hoof, 767
of scapula of horse, 74
of tibia of horse, 101
ventral, 25
of cervical vertebræ of ox, 112
Spinous muscle, transverse, of neck of horse, 231
notch of horse, 51
process of axis of horse, 34
of ox, 112
of cervical vertebræ of ox, 112
of lumbar vertebræ of horse, 39
Spinous process of lumbar vertebræ of ox, 114
of thoracic vertebræ of horse, 36
of ox, 112
of vertebræ of horse, 42
Spiral canal of cochlea, 759
organ of corti, 760