184  'L     EDITORIAL.— PEREIRA's  MATERIA  MEDICA. 
338  and  339)  we  observe  that  the  texture  is  homogeneous,  and  consists  of 
ligneous  fibres  uniformly  distributed  in  cellular  tissue  filled  with  resinous 
matter.  This  tissue  is  interposed  between  the  fibres  so  as  almost  to  isolate 
them.  If  we  examine  a  longitudinal  section  of  the  liber  (see  fig.  340)  it  will 
be  seen  that  the  ligneous  fibres  are  short  and  fusiform,  and  their  obliquely 
truncated  extremities  are  only  loosely  adherent  to,  or  are  even  completely  in- 
dependent of  those  next  to  them." 
Fig.  338.  Fig.  339.  Fig.  340. 
Transverse  section  of 
eatire  thickness  of  a 
piece,  of  bark  with  a 
portion  of  the  periderm 
attached. 
Microscopic  Structure  of  Calisaya  Barks* 
pd.  Portion  of  ihe  periderm.  fl.  Ligneous  fibres  of  the  liber  (cortical  fibres.) 
L  Liber.  rm.  Medullary  rays, 
cc.  Cellular  tissue. 
Under  the  general  name  Pseudo-  Calisaya  barks,  Dr.  Periera  includes  the 
barks  of  Cinchona  Calisaya,  var.  Josephinia,  C.  Boliviana,  C.  ovaia,  var„ 
rvfinervis,  C.  micraniha,  0.  scrobiadata,  and  C.  amygdalifoKa. 
The  other  barks  are  arranged  under  eleven  distinct  heads,  viz: 
2.  Cortex  Cinchonas  de  Carabaya.  3.  Cortex  Cinchonse  de  Cusco.  4.  Cortex 
Cinchonas  de  Huanuco.    5.  Cinchona  Huamilies.    6.  Cortex  Cinchonas  de 
/ 
