16 
physiological functions, separate and distinct from each other. The 
main bundles from which the end-terminations are derived may usually 
be traced to the main nerve of a villus, and thence to their sub- 
epithelial ending. 
The granular zone at the base of the follicles of LiEBERKÜHN, 
is by this method entirely destitute of nerve terminations in any form, 
Fig. 3. Second variety of nerve termination in muscularis mucosae. 4. Nerves twisting 
around blood-vessel. 2. Vessel. C. End-spray of terminal knobs between mus- 
cular fibres. 
the nerves either separate, or accompanying the blood vessels, simply 
pass through it to regions nearer the free surface. An occasional 
branch is however occasionally given off from a larger bundle, but 
even it may be traced inwards into one of its secondary plexuses on 
further investigation. 
After passing through the granule layer, the nerve bundles range 
themselves directly into two subdivisions, which form almost distinct 
and separate plexuses, the Lieberkiihnian and the villous. 
The former after penetrating slightly inward beyond the limits 
of the granular zone, begins to ramify in the adenoid tissue between 
the closed follicles, running over and between them, dividing and sub- 
dividing dichotomously with moderate frequency, and forming a very 
open plexus, which is to be met with in every direction between and 
upon the closed follicles, completely encircling them. From this Lieber- 
kühnian sub-plexus, very rarely offshoots join the nerves of the villi, 
but for the largest part the nerve supply is entirely distinct. 
Where the solitary glands are moderately closely set together the 
first sub-plexus is most easily seen, the bundles or single fibres are 
