OBSERVATIONS ON A FLAGELLATE OF OEBCOMONAS. 255 



kaiyosomes separate. The flagella are duplicated at this stao-e, 

 but they still have a common rhizoplast, which is inserted 

 into one point of the elongated nuclear membrane, which is 

 drawn out slightly at this point towards the anterior end of 



Text-figs. 14-16. 



14. 





15. 



16. 



Text-fig. 17. 



W 



Dividing forms. 



the body of the flagellate. Division of the nuclear membrane 

 commences by a constriction at the point opposite the in- 

 sertion of the rhizoplast. The division is completed, and the 

 two nuclei, each with an apex, are connected to the base of 

 the rhizoplast. The rhizoplast finally divides longitudinally, 

 so that there result two nuclei, each with a rhizoplast and two 

 flagella. The exact method of origin of the flagella I was 



