LEISHMANIA 371 



flagellum forms in this vacuole, and is not directly connected with, the kineto- 

 nucleus. 



The flagellate form has a dark blue, granular cytoplasm with a circular 

 t rophonucleus, which stains deeply in the centre, and a kinetonucleus lying 



Fig. 86. — Leishmania donovani Laveran and Mesnil. 



I, Free binucleate forms (after Christophers); 2, endothelial cell and leuco- 

 cytes containing parasites (after Christophers) ; 3, capillary in the liver, 

 showing endothelial cells containing parasites (after Christophers) ; 4, two 

 parasites escaping from a leucocyte in the alimentary canal of the bug (after 

 Patton) ; 5, further development in the bug (after Patton) ; 6, flagellate forms 

 in the bug (after Patton); 7-1 1, culture forms (after Leishman) ; 7, 8, 9 show 

 the development of the flagellum. 



across the long diameter, and situated near the trophonucleup, and possessing 

 a long flagellum consisting of a number of filaments adhering closely together, 

 inserted into a pale area near the kinetonucleus. These parasites may divide 

 into two equal or unequal flagellate forms, and apparently may go on so 

 dividing lor a length of time. 



