No. I.] SPERMATOGENESIS OF BATRACHOSEPS. 



57 



The auxocytes give rise to spermatocytes, which divide by 

 homoeotypic mitosis, the result of this latter mitosis being the 

 spermatids. 



The auxocytes pass through the following stages of develop- 

 ment : 



Auxocyte in the " imperfect resting stage," showing the formation of leaders consisting 

 of round chromioles surrounded by a film of chromoplasm. The leaders start from two 

 chromoplasts of unequal size, both containing endochromatic granules. The leaders are 

 connected by a linosomic network. Four linoplasts. In the cytoplasm are seen the two 

 spheres, the inner one, the granosphere, containing the archosome. There are eight acces- 

 sory archosomes, some in the plasmosphere, others in the cytoplasm. The two spheres 

 are of a foam-like structure. The cytoplasm is only partially indicated. 



A. Resting Stages. — A stage of groivth, (luring which the 

 last daughter-cell of the previous generation increases in size 

 and finally reaches the first stage of the auxocyte (Fig. ii). 



B. Prophases. — Bouquet zvith twisted spireme segments. 



