224 ILUNOIS BIOLOGICAL MONOGRAPHS \SU 



EXPL.\NATION OF PLATE 



Fig. 71. Bothriocephalus scorpii, toto of two segments. 



Fig. 72. Bothriccephalus claviceps from Eupomoiis gibbostu, toto of mature proglottides. 



Fig. 73. Bothriocephalus manubriformis, toto of mature proglottides. 



Fig. 74. Ckstobothriutn crassiceps, segments showing spurious articulations. 



Fig. 75. CUstobotlirium crassiceps, toto of mature proglottis. 



Fig. 76. Abothrium rugosum, frontal section of mature proglottis. 



Fig. 77. Abothrium crassum, toto of ripe proglottis of strobila from Coregonus clupeiformis. 



