18 
curious appearance, but in a very large number of sections I have 
never found the ganglionic thickenings described by S. Ramon Y Casau 
in the villous network of the Guinea pig, my results being in close 
accordance with those obtained by Drascu. 4 
The divisional ramifications pass upward and outward in every 
direction, twist around each other, sub-divide into filaments of the 
greatest tenuity, wrap the blood vessels and lacteals in their meshes, 
and form through every portion of a villus a most complex and de- 
licate network of fine non-medullated fibres, the closeness and num- 
bers being astonishing. Single fibres show the utmost variety in their 
division and form, though all confirm to contain fixed rules. Nearly 
all have.a curious zigzag 
moe appearance (Figs. 1 and 
' 4), doubtless to allow for 
ie stretching ‘of the villi. 
All the main stems in- 
variably terminate in 
minute rounded, rarely 
elongated bulbs just ben- 
eath the epithelial cove- 
ring of (the: villi, not 
penetrating it, or ex- 
tending offshoots of fine 
fibres into it, so far as 
I have been able to dis- 
cover, but simply ter- 
minating in small end 
bulbs, the dark staining 
of the silver salt not 
permitting the intimate 
structure of the bulb to 
be recognized. Side twigs 
from the main fibres fre- 
quently have these ter- 
minal bulbs as their en- 
dings, and terminate in 
the same manner, a 
| 
Fig. 4. Single nerve fibres from villi. A. Epithelial covering of villus. 2. Terminal 
knobs. ©. Thickening of nerve stem. DD. Fibres twisted together. Zeiss, 
Objective E, Ocular 2. 
