262 
are intended only to show the peculiar arrangement of the 
fibres. 
It is still a question among histologists whether the nerves 
in the body of the cornea are in connection with the corpus- 
cles. Kiihne first described this connection. Kolliker is 
opposed to him, and Engelmann has observed such a connec- 
tion in very few instances. On examining a preparation of 
the cornea in which the nerves are well stained as there 
figured (fig. 4), it appears at the first glance as if anas- 
tomoses between nerves and corpuscles occurred in all 
directions, it is only after carefully tracing the fibres one 
by one that such is found not to be the case. The fibres 
nearly always pass either under or over the processes of the 
corpuscles. Still there can be no doubt that in gold prepara- 
tions a direct continuity is to be observed between the sub- 
stance of the corpuscles and that of the nerves. Such, how- 
ever, occurs, as far as I have been able to observe, very seldom. 
No certainty can be arrived at, unless a very thin layer not 
more than one corpuscle thick be examined, so that no de- 
ception may occur from superposition. ‘Two corpuscles from 
such a preparation are figured (fig. 3) ; they are from the 
cornea of Rana esculenta. There can be no doubt here 
about continuity of substance, and the appearance is the 
same when the preparation is examined with very high 
powers. If Schweigger Seidel’s view as to the post-mortem 
nature of the corpuscles be correct, it naturally follows that 
such connection as this is also an artificial production due to 
the reagents employed. It is merely here contended that an 
actual connection between corpuscles and nerves is to be seen 
in gold preparations of the cornea, a fact doubted by many 
observers. ‘The nerve in connection with a corpuscle is not 
by any means one of the finest twigs. In the same prepara- 
tion is another case in point in which the nerve is much 
finer. The present example is merely chosen because it is so 
very distinct. 
Figured also in the plate (fig. 5) is one of the finest 
nerve-fibres from the front of the cornea of Rana esculenta 
just below the epithelium. Kolliker mentions the vari- 
cose appearance of these fibrils as seen in gold preparations. 
As their appearance is very remarkable, a drawing of them is 
given as seen under ,'; immersion of Gundlach. The vari- 
cosities are so regular that there must be some structural 
peculiarity which causes them to assume this form under the 
action of the reagents. I have not noticed anything very 
similar in other fine nerye-fibres when treated with gold. 
