. Quain's elements of anatomy . asing ; the nerve- and ganglionic layers, which were aheady very thinand incomplete, cease altogether at the ora, the inner molecular layer (c),which is now largely occupied by Miillerian fibres, retains its thicknessup to a certain point, and then abruptly terminates (a), while the nuclearlayers, outer and inner, (/, d), here become merged into a single stratum,which appears to be continuous with the columnar cells of the parsciliaris. These cells (fig. 356, vi), Avhich are at first of considerable Fig. 356.—Vertical section THROUGH THE CHOROID ANDRETINA NEAR T
. Quain's elements of anatomy . asing ; the nerve- and ganglionic layers, which were aheady very thinand incomplete, cease altogether at the ora, the inner molecular layer (c),which is now largely occupied by Miillerian fibres, retains its thicknessup to a certain point, and then abruptly terminates (a), while the nuclearlayers, outer and inner, (/, d), here become merged into a single stratum,which appears to be continuous with the columnar cells of the parsciliaris. These cells (fig. 356, vi), Avhich are at first of considerable Fig. 356.—Vertical section THROUGH THE CHOROID ANDRETINA NEAR THE ORA SER- RATA (Kolliker). 60 dia-meters. a, hyaloid membrane; b,limiting membrane and ner-vous layer of the retina; c,ganglionic and inner molecularlayers with closely set Miille-rian fibres ; d, inner nuclear;£, outer molecular ; f, outernuclear layer; g, columnarlayer ; h, pigment; i, k, cho-roid ; I, part of one of theciliary processes ; m, pars cili-aris of the retina. (The recessshown at a is not constant.) Fig. ^|lt»«»- length, become gradually shorter anteriorly ; they are finely striated(fig. 357, 2), and each cell has a clear oval nucleus at the outer part ofthe cell, near the pigmentary layer. The inner end may be rounded, Fig. 357. A SSIALL PORTION OP THE CILIARY Fig. 357. PART OP THE RETINA (Kolllker). 350 DIA-METERS. A, human ; B, from the ox ; 1, pigment-cells ;2, cells forming the pars ciliaris. pointed, square, or even branched ; thesides of the cells, too, are sometimesuneven. These cells are considered by Kollikerto correspond with the Miillerian fibresof the retina, but according to Schwalbethe Miillerian fibres, or rather theirunited inner ends, are represented by a delicate membrane, which covers the inner ends of the columnar cellsand sends fine offsets around and between them. Vessels of the Retina.—A single artery {arteria centralis retinm)passes between the bundles of fibres of the optic nerve to the innersm-face of the retina at the mi
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