. Quain's elements of anatomy . lined by stratified epitheliumcontinuous with that of the skin : but the ducts and the glandular recesseshave a lining of cubical epithelimn filled with the fatty to Colosanti the glands have a basement membrane, and a Fig. 324.—Meibomian glajtds op THE LEFT EYELIDS AS SEEN FROMBEHIND. «, a, palpebral conjiinctiya; i,lachi-ymal gland; 2, openings of sevenor eight of its ducts ; 3, upper andlower puncta lachrymalia; 6, 6, endsof the upper and lower Meibomianglands, of which the openings areindicated along the margins of theeyelids. muscular la
. Quain's elements of anatomy . lined by stratified epitheliumcontinuous with that of the skin : but the ducts and the glandular recesseshave a lining of cubical epithelimn filled with the fatty to Colosanti the glands have a basement membrane, and a Fig. 324.—Meibomian glajtds op THE LEFT EYELIDS AS SEEN FROMBEHIND. «, a, palpebral conjiinctiya; i,lachi-ymal gland; 2, openings of sevenor eight of its ducts ; 3, upper andlower puncta lachrymalia; 6, 6, endsof the upper and lower Meibomianglands, of which the openings areindicated along the margins of theeyelids. muscular layer outside this :he further describes a networkof fine nervous fibrils amongstthe epithelium-cells. A layer of unstriped muscular tissue is contained in each, eyelid ; that of theupper (fig. 323, c) arising from the under surface of the levator palpebrse, that ofthe lower from the neighbourhood of the inferior oblique muscle, and each beinginserted near attaclied margin of the tarsus. It may also be mentioned in c c 2. 388 THE EYE. this place that H. Miiller described a layer of un striped muscle bridging over thespheno-maxillary fissure, corresponding to a more largely developed layer foundin the extensive aponeurotic part of the orbital wall of various mammalia. Thisset of fibres has been also described by Turner (H. Miiller, WurzburgSitzungsb.,1858 ; Turner, Nat. Hist. Eev., 1862). These involuntary muscles are under theinfluence of the cervical sympathetic. The eyelashes (cilia) are strong short curved hairs, arranged in two ormore rows along the margin of the lids, at the line of union betweenthe skin and the conjunctiva. The upper lashes are more numerousand longer than the lower, and are curved in an opposite direction. Near the inner canthus the hairs are weaker and more scattered. Immediatelywithin the eye-lashes, between them and the ciliary bundle of the orbicularis, isa row of large modified sweat-glands, which open into the mouths of largesebaceous glands
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