106 PHYSICAL BASIS OF HEREDITY 



FiQ. 45. — Cells emerging from the resting stages preparatory for the next sperm atagonial 

 division. (After Wenrich.) 



Kin. 46. — Cells emerKing from their last spermatagonial division, a. b; passing into the 

 synapsis stage, c, d: (After Wenrich.) 



