36i 
Morfhology  of  Chtinga'  Trypanosome 
(a)  In  original  case 
In  fresh  preparations  the  trypanosomes  were  long  and  caused 
considerable  disturbance  among  the  corpuscles;  they  remained 
localised  to  the  field. 
Stained,  two  main  types  were  discernible. 
I.  A  ‘long’  foiTO  measuring  from  2475  to  303  /i  in  length 
(average  26'g  4)  by  1-5  to  2-0  4  in  width.  An  average  measurement 
of  a  series  is  :  — 
Extremity  to  Blepharoplast  Nucleus  to 
Blepharoplast  to  Nucleus  Nucleus  extremity  Free  Flagellum 
5-62  375  5.62  8.7^ 
The  body  is  narrow,  the  posterior  extremity  drawn  out  into  what 
Balfour  describes  as  a  ‘pike’s  head’;  the  other  is  continued  as  an 
ectoplasmic  prolongation  for  a  variable  distance  along  the  flagellum  ; 
the  cytoplasm  stains  faint  bluish  and  is  relatively  free  from  granules 
or  vacuoles.  The  blepharoplast  is  removed  about  3-0  /x  from  the 
extremity,  and  the  elongate  nucleus  (375  x  1-5)  lies  well  to  the 
flagellar  end  of  the  body.  The  undulating  membrane  is  fairly  well 
developed,  though  hardly  so  much  so  as  is  usual  in  T.  evansi ;  the  rim 
IS  continued  as  a  free  flagellum  varying  from  6  to  1 1  in  length,  clear 
of  all  ectoplasm. 
2.  ‘Short’  forms  measuring  from  17-15  to  2rg/i  m  length 
(average  ig-o  //)  by  2  to  3-5  //  (average  2-6  //)  devoid  of  a  free 
flagellum,  or  having  only  a  beak  of  one  or  two  micra.  The  following 
IS  the  mean  of  a  series  of  measurements;  — 
Extremity  to  Nucleus  to 
Nucleus  Nucleus  flagellar  extremity 
^■55  2-2  10-25 
The  body  is  relatively  broad  ;  the  posterior  extremity  is  bluntly 
angular  or  sometimes  rounded ;  in  a  few  cases  it  showed  evidence  of 
eing  drawn  out.  The  cytoplasm  stains  more  pink  than  is  seen  in 
the  ‘  long  ’  forms,  and  granules,  though  rare,  are  of  more  common 
occurrence  ;  vacuoles  were  not  noted.  The  blepharoplast  is  removed 
rom  0-;  to  1-5  /i  from  the  extremity  or  may  be  almost  terminal. 
