TRICHOMONAS FROM GROUSE 



61 



blepharoplast. These flagellates also form post- 

 flagellate forms or cysts, which in the case of the 

 trypanoplasm of Dendrocoels has been shown to 

 infect young forms of the host by way of their 

 mouths. Here, too, 

 occurs the interest- 

 ing feature of he- 

 reditary infection, 

 the tiny Dendro- 

 ccels being infected 

 when they leave 

 the body of the 

 mother, and the 

 eggs of the parent 

 sometimes seem- 

 ing to consist of 

 writhing layers 

 of trypanoplasms 

 around the young, 

 developing em- 

 bryos within the 

 shell. 



Another remark- 

 able flagellate or- 

 ganism occurs in 

 the body cavity of 

 the Ccelenterates, 

 known as Siphonophores. The flagellate, Trypanophis, 

 is interesting in that a form of skeletal axis has begun 

 to evolve, and shows as a row of bars down the body 

 of the organism. Other flagellates with skeletal axes 

 are known, the Trichomonas (Fig. 17) from the 



f. 



FIG. 17 TRICHOMONAS EBERTHI, FROM 

 THE GROUSE *' 



