PLATE 8 

 Figures 9 to 18, showing variations in size and shape. 



Figs. 9 and 16, from material killed in picro-mercuric, stained in Bordeaux R, 

 aqueous iron haematoxylin. 



Figs. 10, 13, and 18, from material killed in strong Flemming, stained in 

 aqueous iron-alum haematoxylin. 



Figs. 11, 14, and 15, from material killed in hot Schaudinn 's fluid, stained in 

 alcoholic iron-alum haematoxylin. 



Fig. 12, from material killed in picro-mercuric, stained in Mallory's connec- 

 tive tissue stain, modified. 



Fig. 17, from material killed in picro-mercuric stained in phosphotungstic 

 acid haematoxylin. 



[262] 



