Am.  Jour.  Pharm. ) 
Xovember,  1901.  i 
Fruit  of  Co  cos  Nucifera. 
549 
Groups  of  thinner-walled  cells  with  dark  brown  contents  are 
occasionally  met  with. 
The  brown  contents  of  all  the  endocarp  cells  react  the  same  as 
the  brown  impregnating  material  of  the  mesocarp. 
(b)  Vascular  bundles  are  studied  with  difficulty  in  the  mature 
shell.  By  the  rupture  of  the  phloem  and  part  of  the  xylem  dur- 
ing growth,  passages  are  formed,  which,  in  shells  transversely  cut  or 
Fig.  9.  Longitudinal-radial  section  of  cocoanut  endocarp  through  the  stone 
cells  and  edge  of  bundle,  qst,  transversely  elongated  and  isodiametric  stone 
cells  ;  1st,  longitudinally  elongated  stone  cells  ;  f,  thick-walled  porous  cells  ; 
g,  pitted  trachea  ;  sp,  spiral  trachea.    X  3°° 
broken,  are  evident  to  the  naked  eye  as  minute  holes.  The  struc- 
ture of  the  bundles  is  still  further  obscured  by  the  presence  of  fun- 
gus threads  and  spores. 
In  structure  the  bundles  differ  from  those  of  the  mesocarp  fiber 
the  bast-fibers  being  replaced  by  forms  intermediate  between  fibers 
and  tracheids  [Fig,  Qrf\    The  vascular  elements  are  chiefly  spiral 
