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nerve of that side (fig. 70, Post. Fun. N.). It is not so 
stout a nerve as the visceral. Piercing the posterior 
wall of the cranial cavity, external to this nerve, it runs 
out to the postero-dorsal wall of the funnel (fig. 69, Post. 
Fun. N.). Next it penetrates the visceral envelope, and 
runs for a short time on the inner wall of this structure, 
and then returns to its outer side (Pl. X, fig. 82). Then 
it runs out to the funnel and innervates its posterior 
region, splitting into three main forks (fig. 69):—(1) A 
fine anterior strand which running forwards splits up 
into several branches innervating the funnel wall; (2) a 
stouter median branch which ends similarly, just behind 
the above; and (3) a posterior strand, which innervates 
the depressor muscle of the funnel. 
B. (5) The Visceral Nerves are very long and 
stout. Much of their course may be followed by removing 
the septal muscle, and also the epithelial cover of the 
visceral mass, as they run over the ventral surface of the 
liver. The visceral nerve is given off from the posterior 
surface of the visceral ganglion, at its external and ventral 
angle (fig. 70, Vzrsc. N.). Piercing the membranous 
posterior wall of the cranium, it reaches the inner surface 
of the visceral envelope (fig. 82, Vzsc. V.), courses along 
the inner surface cf the visceral envelope, just to one side 
of the median line, runs over the anterior surface of the 
liver, and gains its ventral surface. In fig. 69, Vise. N., 
it may be seen on the ventral side of the visceral envelope, 
which it has pierced. It is now separated from its fellow 
by the anterior vena cava, alongside which the visceral 
nerve runs for some time. Further back the visceral 
nerves are also separated by the rectum, which lies on the 
‘right side of the vena cava (fig. 69, R.). At the level of 
the anterior edge of the kidney, the visceral nerves begin 
to slope away from one another, each running out towards 
