56 SOME MINUTE ANIMAL PARASITES 



body of the organism is complete (Fig. 12, F), the 

 nucleus and blepharoplast being separated from one 

 another by a fairly considerable interval. At this 

 stage the organism (Fig. 13) moves about rapidly, 



FIG. 13 HERPETOMONAS PEDICULI : FLAGELLATE STAGE 



A, Flagellate with long flagellum ; B, somewhat broad parasite ; 

 C, an aggregation rosette or cluster of flagellates of different 

 ages and sizes, entangled by their flagella 



lashing with its free flagellum, and sometimes con- 

 tracting its body so that it looks like a peg-top. It 

 moves in a jerky manner, and rolls somewhat as 

 it swims quickly through the liquid in which it is 



