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MR.  R.  OWEN  ON  THE  ANATOMY  OF  LINGUATULA  T^NIOIDES. 
PLATE  XLI. 
Figg.  10  to  16.  LiNGUATULA  T^NIOIDES. 
Fig.  10.  Linguatula  Tanioides,  of  the  natural  size,  as  seen  from  the  ventral  aspect. 
a.  The  serrated  muscular  lateral  parts  of  the  body. 
b.  The  thin  semitransparent  mesial  integument. 
c.  The  circular  mouth, 
d,  d.  The  oblong  pits  containing  the  hooks. 
1 1 .  The  anterior  part  of  the  worm,  magnified  three  diameters,  showing  the  round 
central  mouth,  and  the  lateral  pits  and  hooks. 
12.  The  anterior  and  posterior  parts  of  the  body  of  the  Linguatula  magnified 
four  diameters,  with  the  dorsal  parietes  of  the  abdominal  cavity  removed, 
to  show  the  alimentary  canal,  impregnating  glands,  convoluted  oviduct, 
and  nerves  in  situ. 
13.  The  nervous  and  generative  systems  removed  from  the  body ;  the  uterine 
tube  cut  short. 
14.  A  part  of  the  generative  system,  showing  the  junction  of  the  oviducts  and 
vesicul(S  seminales. 
The  same  letters  indicate  the  same  parts. 
a.  The  external  or  epidermic  layer  of  the  integument. 
b.  The  muscular  layer. 
c.  The  (esophagus.  ^ 
d.  The  dilated  part  of  the  alimentary  canal  or  stomach. 
e.  The  intestine,  surrounded  by  the  coils  of  the  oviduct. 
/.  The  anus. 
g.  The  single  subcesophageal  ganglion. 
h,  h.  The  anterior  pair  of  nerves  passing  on  either  side  of  the  oesophagus. 
i,  i.  The  second  and  third  pairs  of  lateral  nerves,  going  to  the  foss(S  and 
hooks. 
fe,  k.  The  fourth  lateral  pair  of  nerves,  supplying  the  genital  organs. 
I,  I.  The  fifth  or  posterior  pair  of  nerves,  supplying  the  body, 
m,  m.  The  male  organs  or  glands  secreting  the  impregnating  fluid. 
n,  n.  The  ovary. 
0,0.  The  oviduct. 
p.  The  uterus,  or  tube  formed  by  the  union  of  the  oviducts  and  testes. 
15.  An  ovum  of  Linguatula  Tcsnioides,  magnified  300  diameters,  showing  its 
breadth  and  the  recedence  of  the  vitelline  from  the  cortical  membrane 
at  a. 
16.  An  ovum,  showing  its  thickness,  or  lesser  transverse  diameter,  with  part  of 
the  connecting  substance  adhering  to  it. 
