415 
of such fibres lying between the varicosities appear, with a 
high magnifying power (immersion 10), striated, as if made 
up of fibrille. (6) They possess;a nearly completely direct 
rectilinear course, and bend after a longer or shorter course 
into a direction which is at right angles to the former one. 
(c) They remain for long distances unbranched. It is not 
rare to find a field of view with the microscope, where, out 
of the enormous number of fine fibres crossing one another 
in all directions, relatively few give off a lateral branch at 
right angles, which connects itself at a similar angle with 
another distant fibre. This is found to be true of all the 
fibres of this order when they are followed out—. e. that 
they are connected one with another by cross fibres running 
at right angles to them, and in this way a rectangular trellice- 
work is formed. Im a successful gold cornea from which 
only the outer layer of epithelium has been removed, it is 
quite impossible to say precisely, on account of the great 
richness of the network of the finest nerves, and of the net- 
work of the processes of the corneal corpuscles, whether the 
fibres of the one come into anatomical connection with the 
processes of the other. It is otherwise, however, when one 
splits up the cornea into as fine lamelle as possible, and 
makes use of these for the investigation. In such a prepara- 
tion where the corneal corpuscles are present only in one 
layer in some places, in others in two layers, we see finer 
fibres passing off at right angles from the fibres of the nerve 
trellice-work, which finer fibres are also beset with globular 
enlargements. Two or more of these finer fibres pass 
directly on to a corneal corpuscle, on the surface of which 
they divide themselves into short branches, and join together 
by these branches reticularly. 
I could not convince myself of a penetration of these fibres 
(which may be called fibres of the fourth order) within the 
substance of the corpuscles, nor of a connection with the 
nucleoli of the nuclei of the corpuscles. Where I find these 
connected fibres in my preparations forming a terminal net- 
work—and as such I[ will venture to designate them—l 
observe them always to lie on that surface of the corneal 
corpuscle which is directed to the outer surface of the 
cornea. 
In preparations, which consisted of the hindermost layers 
of the cornea, indifferently whether they were mounted with 
the endothelium (28) of Descemeti directed upwards or down- 
wards, I found fibres of the fourth order, which I was able 
exactly to follow into the layer of the endothelium. This is 
the easier, since one has no trouble from the interference of 
