552 W. A. HERDMAN AND J. A. OLUBB. 
The chief epipodal nerve (figs. 28 and 29, ep. z.) is found to 
arise from about the middle of the dorsal and external edge of 
the large pedal ganglion on each side, and to curve outwards 
and ventrally (fig. 29). After a short course it passes through 
the muscular layer of the body-wall and is distributed to the 
clumps of cerata (fig. 28). 
In addition to the main epipodial nerve we have found also, 
on the left side only, a small nerve which arises from the 
ventral and posterior part of the cerebro-pleural mass, just 
below the eye (see Pl. XXXIV, fig. 28, right side of figure), 
and runs ventrally (fig. 28, acc. ep. nv.) till it gets opposite the 
middle of the buccal mass, and then passes outwards through 
the layer of muscle-fibres (see fig. 31, acc. ep. n.) to reach the 
base of a clump of cerata. This nerve may, therefore, be re- 
garded as pleural in its nature ; it is distinctly anterior in its 
origin to the main epipodial nerves springing from the pedal 
ganglia, and so far as we can find it supplies only the most 
anteriorly placed clump of cerata on its own side. 
There can be no doubt as to the ganglia from which the 
main epipodial nerves arise. Not only do their relations to one 
another and to the other ganglia and to the cesophagus (see 
Pl. XXXIV, fig. 29) show clearly that they are the pedals, 
but we have also traced from them the ordinary pedal nerves 
(fig. 31, p. .) going to the foot. These pedal nerves arise 
from the ventral surface of the ganglia two or three sections in 
front of the origin of the main epipodial nerves, and two or 
three sections behind where the small accessory epipodial nerve 
arises from the left pleural. They are in the same section 
with the otocysts (Pl. XXXIV, fig. 31, 0. c.) which lie on the 
upper surface of the pedal ganglia. 
These figures of Facelina coronata show some other 
points of interest. ‘The numerous sections of the cerata show 
the relations between the cnidophorous sac and the hepatic 
cecum (fig. 28) ; and the opening of the latter into the ducts in 
the body (figs. 28 and 31, 7. h. ce.), and also the position of the 
cnida in distinct cnidocysts, which are epithelial cells turned in 
from the ectoderm on the apex of the ceras, as we have shown 
