ELEDONE. 543 
the lamella alternating with the internal one. Soon after 
attaining the ventral surface of the liver, the visceral 
nerve gives off a large, much-branched nerve to the 
anterior vena cava. ‘his runs down along the wall of the 
vessel to about the level where the ink duct enters the 
visceral mass (fig. 69). A second branch runs out from 
the main nerve, over the visceral envelope, and ends in 
small branches to the depressor of the funnel. On its 
way, this nerve gives off several branches to the visceral 
envelope, and while that of the right side furnishes a long 
branch to the bent region of the intestine, that of the left 
sends a fine branch to the rectum (fig. 69). The visceral 
nerve, during its course over the liver, gives off many fine 
or 
o>) 
branches to that organ, to the ink sac, to the kidney wall, 
&c. Nerves may also be seen running to the rectum and 
the septal muscle. 
B. (6) The Pallial Nerve is a broad flat nerve 
given off from the posterior dorsal angle of the anterior 
visceral ganglion (fig. 70, Pall. V.). Running posteriorly 
and outwards, it pierces the membranous posterior 
cranial wall, and so enters the visceral sac (fig. 82). 
On entering the visceral sac it runs outwards and 
posteriorly along the inner wall of the visceral envelope, 
towards the great lateral muscle, giving several branches 
to the envelope in its course. Then it runs obliquely 
through the lateral muscle, to terminate in a large flat 
triangular star-shaped mass just exterior to this muscle. 
This “stellate ganglion’ controls the movements of the 
mantle, on the inner surface of which it lies, covered by 
the internal epithelium of the mantle. In an adult 
Eledone the ganglion is about 6 mm. across, and_ its 
surface is smooth. It gives off a radiating series of nerves 
to the mantle. These nerves are all stout, and after 
running for part of their course on the internal wall of 
