GENUS: BODO 



609 



nucleus at the centre of the body consisting of nuclear membrane and 

 large central karyosome. The cytoplasm contains various food vacuoles, 

 especially in the posterior region. The two flagella which arise from the 

 anterior end of the body are of unequal length. One is anteriorly directed, 

 and is about the same length as the body, while the posteriorly directed 

 one, which trails over the body in progression, is about twice this length. 



Fig. 250.~Bodo edax (x 1,400). (After Kuhn, 1915.) 



1. Flagellate showing nucleus, kinetoplast, large contractile vacuole, and two flagella. 



2. Division of blepharoijlasts and formation of two new flagella; separation of nucleus into 



two parts. 

 .3. Commencing division of the nucleus, the karyosome occupying the hollow of the dumb-bell- 

 shaped structure. 



4. One part of the nucleus divided, with karyosome in the middle. 



5. More advanced stage with two kinetoplasts. each with two flagella. 



6. Nucleus elongated and karyosome now dividing. 



7. Division of body and long drawn-out karyosome. 



8. One of products of division, nucleus being reconstructed. 



9. Encysted form. 10. Escape of flagellate from cyst. 



Dobell and O'Connor (1921) state that the trailing flagellum may be 

 attached to the surface of the body for a short distance. The cysts|^of the 

 organism are ovoid bodies 5 to 7 microns in length. As a rule, each cyst 

 contains a single nucleus and kinetoplast, though in some cases, as a result 

 of division, two of each of these may be present. 



I. 39 



