SPERMATOGENESIS 

 Alice M. Boring 



PLATE VI 



186 



187 



188b 



189 



191 



192 



193 



194 



^.•-^\-n 



195 



•.*--\\a 



196 



197 



198 



200 



201 



199 



202 



•\\n 



203 



*v4-fl 



204 





205 



y 



m 



206 



207 



I.^'?^^' 



208 



209 



210 



211 



212 



213 



214 



••; * \* 



220 



215 



221 



216 



222 



217 



223 



JASSID^E AND CERCOPID^ 



218 



224 



219 



225 



A. M. B. del. 



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



