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ANATOMY OF THE HORSE. 
ORBICULARIS PALPEBRARUM.—MUSCULUS ClLIARIS. 
Situation. —Within the eyelids: in front of the base of thJ 
orbit. 
Figure. —Obliquely oval; slit in its long diameter. 
Attachment.—To the orbital portion of the ossa unguis e: 
frontis; to the palpebral ligament; and to the skin of both lids. 
Relations. —Externally, with the skin; internally, with tb 
membrana conjunctiva; superiorly, with the former muscle; in 
feriorly with the levator labii; towards the margins of the lids 
with the tarsi; at the inner canthus, with the lachrymal sac. 
Structure. —Fleshy : disposed in little packets or fasciculi. 
Action. —To approximate or shut the eyelids. 
3.—OCULAR REGION. 
LEVATOR PALPEBRiE SUPERIORIS INTERNUS. 
Orbito-palpebralis. 
Situated —Superiorly, between the eyeball and the orbit. 
Form .—Flat, thin, fan-shaped: broad and expanded in front 
harrow and tapering, behind. 
Attachment. —To the inner and upper part of the parietes c 
the optic foramen; and whole breadth of the border of the uppe 
lid. 
Relations. —Superiorly, with the fibrous lining of the orbi 
and the lachrymal gland: interiorly, with the levator oculi an 
sclerotica. 
Direction. —Oblique : from behind, forwards; from belov 
upwards; and from within, outwards. 
Structure. —Posterior attachment, tendinous; anterior, ape 
neurotic; intermediate part, fleshy, pale and delicate. 
Action. —To raise the upper eyelid. 
S LEVATOR OCULI.—RECTUS SUPERIOR OCULI. Y 
DEPRESSOR OCULI.-RECTUS INFERIOR OCULI. f 
ABDUCTOR OCULI.-RECTUS EXTERNUS OCULI. T 
ADDUCTOR OCULI.-RECTUS INTERNUS OCULI. J 
Situation. —Within the orbit, at respective and equal distance 
one from another, along the superior, inferior, and lateial par 
of the eyeball. 
Form. —Elongated, curved, conoid: broad parts turned to 
wards. 
Attachment. —To the circumferent parts of the optic foramen 
and to four opposite points, equidistant one from another, ot tl 
sclerotic, where it covers the front of the eyeball. 
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