460 
DR. E. KLEIN. 
Kolliker and Hoyer^ viz. with free ends of the same nature as 
maintained by Hoyer^, while most of those in the substantia 
propria terminate in the processes of the corneal corpuscles. 
I shall return to these observations below in detail, but 
wish to point out here already that they are diametrically 
opposed to those that I described in this Journal in 1871 
(October, 1871), and in the ^ Monthly Microscopical Journal ’ 
(April, 1872), to the eifect, first, that the fine nerves having 
entered the anterior epithelium and having branched and 
run horizontally (Kolliker) for a longer or shorter distance, 
terminate in a network, which I called the intraepithelial 
network ; and secondly, that those in the substantia propria 
do not anastomose with the processes of the corneal cor- 
puscles, as was mentioned by Kiihne, Cohnheim, Mose- 
ley, Lipmann, and others, as will be referred to below 
minutely, but although in their extremely long course many 
times they come in close contact with the corneal corpuscles, 
do not terminate in them but as a network on them. For 
the reason of this discrepancy between my results and those 
of Izquierdo and Waldeyer, I have again made the nerves 
of the cornea a subject of investigation, and I am able to 
prove that neither do they terminate with free ends in the 
anterior epithelium, nor are they connected with the corneal 
corpuscles. ^ 
On making this renewed investigation, I have observed 
several other points which appear to me to be of importance 
in the discussion of the mode of termination of the fine 
nerve-fibres. 
In order to get at the consideration of the intraepithelial 
fine nerves and those of the substantia propria, we shall 
start with the axis-cylinders, which in the front layers of the 
substantia propria are most numerous, forming what are 
called by Arnold the subepithelial, by Hoyer the subbasal, 
and by Waldeyer the fine stroma plexuses. Vv^e shall refer 
to them simply as the stroma plexus. The nature of the 
branches of this plexus, as bundles of primitive fibrils, the 
endothelial perineural sheatli of the larger branches, the 
great difference in thickness of the different branches and in 
the different planes of the same branch, the angular plate-like 
enlargements, where two or more of them join, are so con- 
spicuous that there are hardly any differences of opinion 
about them, and it is therefore unnecessary to refer to 
them more than in j)assing. There is no difference amongst 
the recent observers as regards the position of these plexuses. 
They arc all agreed about their being hehmd Bowman’s 
membrane. 
