TERMINATION OF NERVES OF MAMMALIAN CORNEA. 473 
Tolotschinow (1. c.),E,ollett (1. c., p. 1138) — who is, however, 
not able to say in what way they terminate — Hoyer, and 
Krause (1. c.). And, lastly, those who maintain a special 
termination of the fine nerve-fihrils, Lipmann Virchow’s 
Archiv,’ Band 78, p. 218), who says that the fine fibrils ter- 
minate in the nucleoli of the nuclei of the corneal corpuscles. 
Lavdowsky Archiv f. Mikr. Anat.,’ viii) assumes two kinds 
of terminations of the nerve-fibrils, (a) in rhombic plates, 
supposed to be present in the wall (?) of the lymph-canali- 
cular system (dog), and (b) with peculiar enlargements near 
the nucleus or in the nucleolus (frog, dog, cat, calf). In my 
former papers I have stated that the finest nerve-fibrils in 
the substantia propria, in good gold specimens of the frog’s 
cornea, are conspicuous by their great length, their peculiar 
rectilinear course, their right-angled bending, their few 
branchings ; these fibrils I described as the nerves of the 
third order, and as being nowhere in connection with the 
corneal corpuscles, although they come in close contact with 
them in many jilaces ; they are not the finest nerve-fibrils, 
as assumed, since in some places they are seen to give off very 
minute short fibrils — nerve-fibrils of the fourth order — which, 
on the surface of the corneal corpuscles, anastomose in a sort 
of network. 
I have now extended my observations on the fine nerve - 
fibrils in the substantia propria of the cornea of the kitten and 
rabbit, and I must also for these maintain that the fine 
nerve-fibrils that one sees in ordinary gold specimens are 
not the finest and last fibrils. Especially easily followed are 
the fine nerve-fibrils in the anterior strata of the substantia 
propria, where they form what we considered above as the 
deep subbasilar fibrils, and which have been very beautifully 
described already by Hoyer. But also in the deeper sections 
of the substantia propria similar fine nerve-fibrils can be met 
with. Their general character is that they may be traced 
for very long distances ; that they possess now a rectilinear, 
then, again, a wavy course ; that they keep close to the 
corneal corpuscles, always running in the lymph-canalicular' 
system, as was already known to v. Recklinghausen, and as 
was very extensively described by Lavdowski and Hoyer ; that 
they give off from place to place a lateral branchlel ; that in 
some parts they are seen to bend off suddenly at a right 
angle, either after a long rectilinear or curved course, or at 
short intervals ; further it will be noticed that tliey continu- 
ally change their level, now passing into a stratum above or 
below, then again returning into their original plane; and. 
