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MR.  R.  OWEN  ON  THE  ANATOMY  OF  THE  CALYPTRiEIDJE. 
s.  The  vas  deferens. 
t.  (Fig.  4  )  The  ovary. 
u.  (Fig.  5.)  The  oviduct. 
V.  The  mucous  gland. 
w.  The  auricle,  x.  The  ventricle,  of  the  heart, 
a.  The  supra-oeSophageal  ganglia  giving  off  the  nerves  to  the  tentacles 
and  eyes. 
j3.  The  sub-oesophageal  ganglia, 
y.  The  branchial  ganglion. 
