TRANSACTIONS OF MICROSCOPICAL SOCIETY. 
DESCRIPTION OF PLATES YI & VII, 
Illustrating Dr. Ciaccio^s paper on the Nerves of the Cornea, 
and of their Distribution in the Corneal Tissue of Man 
and Animals. 
Fig. 
1. — One of the largest nerve-trunks from the cornea of the sparrow, show- 
ins; the nianiier in which the nerves branch, the nuclei connected 
willj the primitive nerve-fibres, and the relative position of the 
latter in tlie trunks as well as in the branches. X 150. 
2. — Shows the manner in which the bundles of nerve-fibres are arranged in 
the formation of tlie network in the cornea of the sparrow. Two 
triano-ular bodies are also seen in connection with these bundles. 
X 700. 
3. — One of the quadrangular bodies found in connection with the nerves 
distributed to the cornea of the sparrow. Bundles of nerve-fibres 
are observed to arise from it in four different directions. Some of 
the fibres, in passing from one bundle to another, flank one of the 
sides of the small body, while others seem to proceed directly 
from it. A nucleus and granular matter are also seen in the part 
within. X 750. 
4. — From the cornea of the sparrow, a. Small, triangular body, witli 
nucleus and granular matter, connected with bundles of nerve- 
fibres. B. A very small bundle of fibres, which, on meeting 
another bundle, nearly at a right angle to it, divides into two finer 
ones, which run in opposite directions, parallel with the other 
bundle. X 350. 
5. — A rather large nerve-trunk, just at its entrance into the corneal tissue. 
The fibres, of which it is made up, are seen to be nucleated, but 
they have not the slightest aj^pearance characteristic of dark -bor- 
dered fibres. On the contrary, the fibres bear a great resemblance 
to the so-called gray or gelatinous fibres of the sympathetic. I'rom 
the cornea of the eel. x 250. 
6. — Very small bundles of nerve-fibres forming networks. Trom the 
cornea of the eel. X 850. 
7. ^0ne of the branches resulting from the fourth division of a large nerve- 
trunk from the cornea of the f rog. The course and continual change 
of the relative position of the nerve-fibres is well shown. More- 
over, in the point where the branch undergoes division, is seen a 
fine fibre, which seemed to be a single libre, but really divides into 
two finer ones, which go in opposite directions. This fact is very 
frequently observed in the distribution of nerves to the cornea of 
the frog. No nuclei are observed in connection with the fibres 
forming the branch, x 350. 
