234 ILUNOJS BIOLOGICAL MONOGRAPHS (522 



EXPLANATION OF PLATE 



Fig. 98. Ligula itUestitudis, union of vagina and vitelline duct with oviduct. The reference 



line is 0.1mm. long. 

 Fig. 99. Cyaihocephalus atnericanus, oocapt containing an ovum. 

 Fig. 100. Marsipometra hastate, genital cloaca from frontal section. 

 Fig. 101. Marsipomelra hastata, cirrus sac from a transection. 

 Fig. 102. Botkriocephalus cuspidatus, median sagittal section, composite. 

 Fig. 103. CUsiobotkrium crassiceps, median sagittal section, composite. 



