SPERMATOGENESIS OF THE CHICKEN 



ALICE M. BORING AND RAYMOND PEARL 



PLATE 4 



4^ P ir 



38 



39 



40 



41 



j|r ^ #* 



V 



42 



4 3 



44 



45 



if * » It. 



46 



47 



48 



49 



9^ 



t 



so 



SI 



If 



S2 



53 



79 



