Hygienic Laboratory, Bulletin 46. 
Plate XVIII 
SPOROBLASTS SHOWING VARIOUS STAGES OF NUCLEAR DIVISION 
AND SEGMENTATION INTO SPOROZOITES; FROM SECTIONS OF 
INFECTED MITES, 7 TO 10 DAYS AFTER BEING PLACED UPON 
INFECTED RATS. STAINED WITH IRON HEMATOXYLIN. 
Figs. 8 and 10 .show cross sections of sporoblasts near one extremity. 
Drawn with camera lucida. 
