SPERMATOGENESIS 

 Alice M. Boring 



PLATE IV 



104 



no 



116 





117 



112 



,^:;>- 



118 



107 



113 



108 



114 



119 



120 



121 



109 





115 



122 



123 



^^»S^j / 



12 4 



125 



126 



127 



129 



a b 



135 



141 



130 



136 

 142 



131 



137 



143 



132 



MEMBRACID^ AND JASSID.« 



The Journal of Experimental Zoology, vol. iv, no. 4 



133 



134 



