357 
existence  of 
was  of  very  frequent  occurrence,  as  also  was  the 
chromatic  granules  at  both  poles  of  the  nucleus. 
Diagnosis 
The  picture  presented  by  the  trypanosomes  is  striking,  and  dis¬ 
similar  to  all  other  forms;  the  ratio  of  breadth  to  length  (i  •  4)  the 
round  aflagellar  extremity  and  the  narrow  undulating  membrane 
giving  It  a  characteristic  shape. 
On  careful  examination  of  some  slides  (Ninamwenda)  a  few  forms 
are  seen  which  individually  would  be  considered  as  not  unlike  a  broad 
tadpo  e  of  T.  nanmn  or  T.  congolense,  but  they  are  most  exceptional 
(the  smal  est  is  seen  on  Plate  IV,  fig.  i).  In  the  successful 
su  -inoculations  at  Kambole  (gumea-pig,  sheep,  goat,  and  ox)  only  the 
characteristic  broad  forms  were  seen.  Sheep  6  and  Goat  3  were 
taken  to  Pretoria,  where  it  was  found  that  the  latter  was  still  showing 
this  type.  The  trypanosomes  in  Sheep  6  were  identical  morpho 
logically  with  the  tadpoles  of  T.  nanum  or  T.  congolense.  We  are 
quite  unable  to  explain  this  at  present.  The  change  may  be  due  to 
a  natural  alteration  in  the  morphology,  or  to  a  secondary  infection 
acquired  on  the  march  down.  During  the  journey  of  six  weeks  from 
Tanpnyika  to  the  railway  these  animals  were  carried  in  large  fly- 
proof  cages,  so  that  Glossina  may  be  absolutely  excluded.  In  country 
known  to  be  free  from  tsetse  they  were  allowed  out  for  a  short  time 
on  arrival  in  camp  at  night,  and  it  might  be  considered  possible  for 
infection  to  have  then  occurred  ;  or,  as  three  sheep  or  goats  were  taken 
m  each  cage,  it  may  have  resulted  without  liberation.  It  is  hoped  that 
Goat  3  may  serve  as  a  control  to  this  change  :  with  both  animals  in 
retoria,  an  exact  and  exhaustive  comparison  may  be  made  Until 
this  has  been  accomplished  we  hesitate  to  do  more  than  assign  this 
tiypanosome  to  the  group  containing  T.  dimorphon,  and  note  that  in 
he  original  and  all  sub-inoculated  animals  at  Kambole  it  presented 
morphological  features  unusual  in  the  other  members  of  the  group 
eatures  which  if  maintained  in  successive  passages  would  warrant  a 
conclusion  that  this  trypanosome  differs  from  previously  described 
species.* 
of  Mr.  Montgomei7''’'and^Dl-  ^  examined  ihe  preparation.s 
Rhodesian  cow.  ^  Kinghorn,  labelled  ‘  Nnmw.nda  strain,’  coming  from  a 
hirge^que^S^|l"4^^4‘  trypanosome  est  voisin  de  Tr.  congolense  mais  beaucoup  plus 
He^r^oses  ff  X  irvLT  ^Ggit  (encore !)  d'un  espece  nouvJik  ’ 
mav  add  that  Dr  Kin 4  really  a  new  species,  to  call  it  Tr.  montgomervi,  and  I 
.  mat  jjr.  Kmghorn  agrees  to  this  propo.sal.--R.  Ross.  ^ 
