52 PROTOZOAX NUCLEUS 



flagellates the flagella are lost, and a non-flagellate stage is developed. 

 When the flagellate stage is resumed, a new axoneme is developed as an 

 outgrowth from the blepharoplast, which may or may not have persisted. 



fe' 





f 



..J 



1 t ;V 



¥ 



O ' 



"^■M'i 



t 



) 



o 



.P: 



■i S 6 



Fig. 31. — Parypolytoyna satura, to snow the Origin of the Blepharoplast 



FROM THE KaRYOSOME OF THE NUCLEUS ( X 2,600). (AfTER JaMESON, 1914.) 



1. Adult flagellate shortly before division. 



2. First division completed: two daughter individuals with the old blepharoplasts and flagella. 



3. Second division: reconstruction of nuclei and division of body into four. 



4. Second division completed: new blepharoplasts are budding off from the karj^osome in the 



upper and left-hand individuals, while the right-hand individual retains the old blepharo- 

 plasts. 



5. New blepharoplasts on outer surface of nuclear membi'ane in three of the individuals, while the 



left-hand individual retains the old blepharoplasts. 

 0. Stage shortly before release of four daughter flagellates: the left-hand individual has the old 

 blepharoplasts and flagella, while the others have new blepharoplasts and young flagella. 



Some evidence has been produced by Jameson (1914) in the case of a 

 ^SigeWa^te, Pai'apolytoma satura, and by Entz (1918) in the case oiPolytoma 

 uvella, that when the non-flagellated stages are about to develop flagella new 



