MR.  R.  OWEN'S  DESCRIPTION  OF  A  MICROSCOPIC  ENTOZOON. 
.  2.  One  of  the  cysts,  magnified  20  diameters,  containing  two  TrichineB :  the  ex- 
tremities of  the  cyst  are  more  than  usually  elongated. 
3.  Another  cyst,  magnified  20  diameters,  containing  a  single  Trichina,  with  one 
of  the  extremities  of  the  cyst  slightly  expanded  and  transparent. 
4.  Another  cyst,  magnified  20  diameters,  torn  open,  and  the  Trichina  with  the 
surrounding  granular  secretion  let  out. 
5.  The  Trichina,  magnified  200  diameters. 
a.  The  head,  showing  the  linear  mouth. 
&.  The  tail. 
6.  The  head  of  another  specimen  of  Trichina,  magnified  300  diameters,  seen  by 
a  WoUaston's  doublet. 
7.  The  middle  of  the  body,  seen  through  the  same  microscope.    A  granular 
substance,  inclosed  in  a  pellucid  integument,  is  all  the  structure  that  this 
view  discloses. 
8.  The  tail  of  the  same  specimen. 
9.  A  cyst,  with  calcareous  parietes,  magnified  20  diameters,  filled  with  opake 
matter. 
