228 ILLINOIS BIOLOGICAL MONOGRAPHS [516 



EXPLANATION OF PLATE 



Fig. 82. Cyathocephalus amerkanus, transection thru ovarian isthmus. 



Fig. 83. Marsipometra hastata, transection thru ovarian isthmus. 



Fig. 84. Bothriocephalus scorpii, transection thru ovary. 



Fig. 85. Bothriocephalus claviceps from Eupomolis gihbosus, transection thru ovary. 



Fig. 86. Bothriocephalus cuspidatus, transection thru ovary of mature proglottis. 



