28 



rod-shaped or angular. The rings may shew a very 

 faint blue outline or a thicker portion on the side 

 opposite to the nucleus. 



Besides these young rings, we have irregular forms 

 of considerable variety, e.g., a mere faint bluish line 

 stretching across the corpuscle, yet always shewing 



Fig. 6. Forms of the malaria parasite commonly met with in the 



blooi : The dark dots in the first line represent chromatin, 



the fine dots, pigment 



somewhere a red nucleus ; or, again, a mere streak 

 along the margin of the red cell, with, however, a red 

 nucleus in the blue protoplasm (accole forms). 



Finally, no small structure should be diagnosed 

 as a parasite unless it is clearly made out that it has 

 three distinct parts. 



(i) A red nucleus. 



(ii) A white vacuolic area within the ring (in the 

 irregula-r forms this cannot be distin- 

 guished), 

 (iii) Blue protoplasm or body. 



