252 
Histology of the Eye. 
[Monthly Microscopical 
Journal, Nov. 1, 1869. 
Fig, 13. 
outer granules, so that these latter lie, all of them, at the inner side 
of the membrana limitans externa. Owing to the radial direction 
of the primitive cone-fibres, the outer granules belonging to the 
central cones lie peripherally, so that the outer granular layer is 
absent from the foveal centre. 
At the inner surface of this layer the cone-fibres combine in a 
plexus the bundles of which, near the centre of the macula, are 
directed obliquely towards the inner surface of the retina ; between 
the centre and the circumference of the macula they assume a 
direction nearly parallel to the retinal layers, and at the circum- 
ference of the macula they run nearly vertically. 
At its inner surface, the cone- 
fibre-plexus breaks up into primi- 
tive fibres, which pass through 
a thin connective tissue stratum, 
the intergranule layer, and enter 
the inner granule layer. This 
latter, at its beginning in the 
centre of the fovea, is not sepa- 
rate from the ganglionic layer; 
The nerve-fibres pursue in it 
the same direction as in the outer 
granule layer. 
The ganglionic layer, at the 
periphery of the fovea, contains 
three or four tiers of cells ; 
these become fewer towards the foveal centre, but even here they 
lie in a double or treble series, bedded in a granular tissue. 
The ora retinae is the other situation to which I referred as 
having a peculiar arrangement of its tissues. Being less important 
than the fovea, I can notice it only very briefly. Towards the ora 
the nervous elements gradually become fewer, the layers thin out, 
the beads and cones shorten and become stouter. With this decrease 
of the nervous tissues, the connective tissues predominate, and they 
are prolonged beyond the ora as the pars ciliaris retinae, the radial 
fibres becoming, according to Kolliker's observations, the columnar, 
epithelial-like bodies which line the pars striata. 
Primitive BaciUary Fibres, from the innermost 
Bundles of the Cone-fibre-plexus, traversing the 
Intergranule Layer. 
