,80.,.-] OX THE CEXTROSOME OF HEPATICEM. 101 



ial cells of Fellia. Very recently Gregoire and Bergh took up the same 

 question in Fellia and came to the conclusion that there is no true Cen- 

 trosome. 



The presence of Centrosnme in the flowering plants and ferns seems 

 to have heen almost conclusively disproved by the careful researches of 

 cytologists during the last ten years. On the other hand it is still generally 

 helieved that in the Bryophytes and Thallophytes Centrosome does exist. 

 But my present study seems to show that there is no true Centrosome at 

 least in the Hepaticeae, agreeing with the conclusion of the recent study of 

 Gregoire and Bergh. The centrosome hitherto reported in the cells of the 

 Hepaticeai are nothing but a centre of cytoplasmic radiation. 



The question of the homology of centrosome and blepharoplast is 

 another interesting problem which has not yet been solved. I am not in 

 the position to express any definite opinion about this question. However, 

 my present study and that of spermatogenesis of Zamia induce me to 

 incline more towards the standpoint of Strasburger and Wehber who 

 consider the two bodies as different Morphological structures. 



Doshisha College, Kioto. 



1) La Cellule, t. XXI, p. 193, 1904. 



