PLATE B. 



" 



13 



*s 



I 



19 



e 



* 







14 



15 



% * 



*:> 



17 



18 



21 



***** 



c 



24 



PLATES A, B, AND C. SUCCESSIVE STAGES IN THE SPEBMATOGENESIS OF SCHISTO 



CERCA DAMNIFICA. 



467 



