SPERMATOGENESIS IN THE ALBINO RAT 



EZRA ALLEN 



PLATE 4 



^A^.*B . C ^ E 



-^ .#^*'^%. 



'^w \i II ^ 





I 



# 





Nu. 



Jr^i^ 





^i^' 



R? 



Cr; X 



27 



i&i, 



29 'if 



.;* 



30 3/ 



# 



32 33 ^ 





35 



36 



37 



40 



41 



42 



45 



