558 W. A. HERDMAN AND J. A. CLUBB. 
Fic. 22.—Part of next section, showing the epipodial nerve free from the 
ganglia. x 300. 
Fic. 23.—Part of next section, showing the epipodial nerve turning up 
dorsally; the nerve is in part out of the plane of the section, but the 
connective-tissue sheath connects the pieces. x 300. 
Fic. 24.—Part of next section, showing the epipodial nerve at the base of 
one of the cerata dividing into a dorsal and a ventral (rather the larger) 
branch, the latter of which runs down round a lobe of the ovo-testis. x 300. 
Fie. 25.—Part of the next section (No. 67), including the basal part of one 
of the cerata, showing the dorsal and ventral branches of the epipodial nerve. 
x 300. 
PLATE XXXIV. 
Fic. 26.—Diagram of Dendronotus arborescens, showing the origin 
and distribution of the dorsal and lateral epipodial nerves. 
Fic. 27.—Diagrammatic scheme of the anterior part of the nerves in last 
figure, showing in lateral view their origin from the ganglia, their branches, 
and the anastomosis between @ and ¢c, the result being that the lateral epi- 
podial nerve has a pedal element in it, while the dorsal epipodial nerve is 
entirely pleural in origin. 
Fig. 28.—Transverse section of Eolis (Facelina) coronata in the region 
of the eye, showing on one side, below the eye, the point of origin of the 
accessory epipodial nerve from the ventral part of the cerebro-pleural ganglion ; 
and also showing a part of the accessory epipodial nerve free from the ganglia, 
This also shows well on the other side the common base to a clump of cerata; 
the hepatic ceca and cnidophorous sacs are seen in the cerata. x 50. 
Fie. 29.—Part of a section a little further back, more highly magnified, 
showing structure of cerebral and pedal ganglia, and the chief epipodial nerve 
arising from the latter. x 300. 
Fic. 30.—Surface section of cerebral ganglion from section adjoining last, 
showing the large superficially placed nerve-cells, with reticulated nuclei. 
x 300 (enlarged). 
Fie. 31.—Part of a section through region of the otocysts, showing an 
ordinary pedal nerve (p. a.) arising from the pedal ganglion, just a few 
sections in front of where the chief epipodial nerve (ep. z. in Fig. 29) arises 
from the same ganglion. This section also shows the accessory epipodial 
nerve on the other side (acc. ep. x.) passing through the muscular layer of the 
body-wall to reach the base of a clump of cerata. Figs. 28 and 31 show 
the course of this nerve from the ganglion to the point of distribution to the 
cerata. x 300. 
Fie. 32.—Diagram of Facelina coronata, from left side, showing the 
origin and distribution of the epipodial nerves, 
