THE CORNEA.

A structure at the outer angle of the antericr chamber, the intervals between the fibres forming small cavernous spaces, the spaces of Fontana. 'fhese little recesses communicate with a circular canal in the substance of the s(llerotic

close to its junction with the cornea. This is the canal of Schlemm, 01' sinus t'en08US 8cler(£; it communicates internally with the anterior chamber through the spaces of Fontana,and externally with the scleral veins. Some of the fibres of this reticulated structure are continued into the front of the iris, forming the ligamentum pectinatum iridi8; while others are connected with the fore part of the sclerotic

. The nerves are numerous, twenty-four to thirty.six in number (Kolliker), forty to forty.five (Waldeyer and Sumisch); they are derived J from the ciliary nerves and enter the laminated tissue of the cornea. They ramify thrQughout its substance in a delicate network, and their terminal fila¬ments fQrm a firm and closer plexus on the surface of the cornea proper beneath the epithelium.