218 ILUNOIS BIOLOGICAL MONOGRAPHS (506 



EXPLANATION OF PLATE 



Fig. 55. Botkriocepkalus scorpii, three anterior primary segments, toto preparation. The 



stars at the side indicate the extent of the segments. 

 Fig. 56. Bothriocephalus scorpii, one farther back, also toto. 

 Fig. 57. Bothriocephalus scorpii, another, showing reproductive rudiments. 

 Fig. 58. Clestobothrium crassiceps, primary segment with reproductive rudiments, toto 



preparation. 



