236 JLUNOIS BIOLOGICAL MONOGRAPHS [524 



EXPLANATION OF PLATE 



Fig. 104. Cyatkocephalus americanus, diagram of median sagittal section. 



Fig. 105. Bothriocephalus scorpii, portion of section, showing imion of vagina with oviduct. 



Fig. 106. Bothriocephalus cuspidalus, young egg, showing an early stage in development, 

 drawn from life. 



Fig. 107. Bothriocephalus cuspidalus, older egg, many-celled stage. 



Fig. 108. Clestobothrium crassiceps, four consecutive sections thru union of vagina and ovi- 

 duct, showing the receptaculum seminis. 



Fig. 109. Abothrium rugosum, union of va^Jia and common vitelline duct with oviduct. 

 The reference line is 0.02mm. long. 



