226 ILLINOIS BIOLOGICAL MONOGRAPHS (514 



EXPLANATION OF PLATE 



Fig. 78. Ligula inlestinalis, median portion of a transection thru the genital cloaca. 



Fig. 79. Schislocephalus solidus, median jxtrtion of transection thru ovary. 



Fig. 80. Schislocephalus solidus, median portion of transection thru the seminal vesicle and 



cirrus-sac. The reference line is 0.3mm. long. 

 Fig. 81. Bothrimonus intermedius, transection thru the ovarian isthmus. 



