36 



SUMMARY OF CURRENT LESE ARCHES RELATING TO 



Faure-Fremiet has stated ; it is more probably an organite of the cell. 

 The mitochondria take part in the typical series in forming the middle 

 piece ; in the atypical series they form the envelope of the body of the 



i. 



S 



C. 



\ \ 



\^ 



'Ir 



\ 



, 1 1 n 





"■ I 



\ ^ 



1, 3, 5, ripe spermatozoa of the typical series, 2, 4, 6, ripe spermatozoa of the 

 atypical series, iu CerUhiuin, Bittium, and Turritella respectively. 



spermatozoon-. No intranuclear rodlet was found. The central cor- 

 puscles of the typical series form the axial filament and the caudal 

 flagellum. The proximal corpuscle forms finally a little ring between 



