PLATE 5 



EXPLANATION OF FIGURES 



25 Proximal end of a developing spermatozoon. The finger-form process is 

 taking shape. 



26 Proximal end of a developing spermatozoon. The finger-form process 

 has reached its maximum size. The cilia-like fibers within the inner tube have 

 largely disintegrated, except those at the bottom of the tube. 



27 Entire young spermatozoon from smear preparation, showing the long, 

 coiled outer tube somewhat surrounded by the gelatinous envelop (g.e.) and the 

 beginning of the formation of the inner tube (i.t.) with the mitochondria flowing 

 into it. 



676 



