1935.] 'llih CEMROSOMES IM MARCHAN1IA. 113 



From all above spoken, it -will be seen that bodies, which I call cen- 

 trosomes, are evidently distinct and constant structures in the antheridial 

 cells of Marchantia and it is not at all improbable that, if Miyake will 

 make a further careful study of his slides, he will success in discovering 

 them. But if even then he will fail to see these bodies, I cannot but 

 conclude that his negative results are due to one of the two following 

 reasons, namely, either his materials were in poor condition or his treat- 

 ment of these {fixation or staining) was imperfect. 



