261 
Some Remarxs on the Nerves of the Cornea of the 
Raspsit and Froc. By H. N. Mose ey, B.A., Radcliffe 
Travelling Fellow. (With Plate XIII.) 
GoLp preparations of the cornea after they have been in 
the cabinet for five or six months in a glycerine mount, gene- 
rally turn dark and very often lose their transparency so 
thoroughly as to become apparently spoiled. It will be 
found, however, that from such specimens really beautiful 
preparations can often be obtained. After this long mace- 
ration in glycerine, the cornea can readily be torn into a 
series of extremely fine layers, so fine, indeed, as in the case 
of the frog, to be only one cornea-corpuscle thick. As the 
neryes continually get darker and darker by the further re- 
duction of the gold chloride, these thin layers are extremely 
instructive with regard to these nerves generally, and espe- 
cially with regard to their relation to the corpuscles, which 
it is extremely difficult if not impossible to determine when 
several layers of corpuscles with the surrounding nerves are 
in the field at once. Although so much has been written on 
the subject of the nerves of the cornea, it is hoped that the 
following remarks and accompanying drawings may not be 
without interest. 
Schweigger Seidel in his exhaustive essay on the struc- 
ture of the cornea in ‘ Ludwig’s Arbeiten,’ has figured 
the points of junction of the larger nerves of the frog’s 
cornea, and has described them as resembling in some 
degree those of Auerbach’s plexus. ‘Those from the cornea 
of the rabbit have, I believe, not yet been figured, though 
they are far more complex in internal structure than those 
of the frog. This structure is only to be seen to advantage 
in very fully stained preparations which have been macerated 
in glycerin for some time and then separated into fine layers. 
The separate fibres of each plexus thus come into view. 
Two of these are figured in the plate (Plate XIII, figs. 1 
and 2), having been drawn with a camera lucida. It will be 
observed that every branch of each plexus has connecting 
fibres which connect it with each of the other branches. As 
the branches are given off in an irregular manner, the plexus 
thus assumes also an irregular form. The two figured are 
selected as good typical examples. ‘There are commonly in 
each plexus two or three fine fibres which do not pass through 
the general mass, but take as it were a short cut from one 
branch to another. There are nuclei in each plexus, but 
they are no longer visible in preparations such as those which 
