34 



the fresh specimen the parasite is very refractile 

 and has a peculiar opaque look) (Fig. 4). 



The finding of crescents, is, of course, diag- 

 nostic of malignant tertian, but the possibility 

 of a double infection, e.g., simple and mahgnant 

 tertian, must be borne in mind. 



Fig. 5. I Quay tan Parasites : segmenting forms 



2. Simple Tertian „ 



3. Malignant Tertian ,, 

 4 Quotidian (after 2iemannJ „ 



We have so far described the forms generally 

 encountered during a febrile attack and the 

 means of making a diagnosis, but it is necessary 

 to consider other forms, e.g., the sporulating forms, 

 and more especially the gametes. 



Sporulating Forms. — Besides the sporulating 

 forms or segmenting forms, we can recognize also 

 the presegmenting forms, in which the pigment 

 begins to collect into a single mass and tfie 

 chromatin gets split into a number of fragrhents. 

 These are even commoner than tlie final or 

 sporulating forms, in which the segments or 

 spores are arranged around a central mass, though 

 frequently here also the appearances do not cor- 

 respond with the diagrammatic exactitude of the 

 text-books. The segmenting and presegmenting 

 forms are best seen in a case of regular quartan. 



