232 ILLINOIS BIOLOGICAL MONOGRAPHS [520 



EXPLANATION OF PLATE 



Fig. 93. Cyathocephahis americanus, frontal section of ripe proglottis. 



Fig. 94. Boihrimonus intermedins, median sagittal section. 



Fig. 95. Boihriocephalus scorpii, median sagittal section, composite. The reference line is 



0.3mm. long. 

 Fig. 96. Bothriocephalus daviceps from Eupomotis gibbosus, median sagittal section. 

 Fig. 97. Boihriocephalus mantibriformis, transection thru uterus opening. 



