336 ILLINOIS BIOLOGICAL MONOGRAPHS [336 



EXPLANATION OF PLATE 



Fig. 97. — Ophiotaenia grandis La Rue, cirrus-pouch and vagina, cirrus partly- 

 protruded. 



Fig. 98. — Ophiotaenia grandis La Rue, cirrus-pouch and vagina, cirrus partly 

 protruded. 



Fig. 99. — Ophiotaenia grandis La Rue, organs of interovarial space as seen 

 in an in toto preparation. 



Fig. 100. — Ophiotaenia grandis La Rue, two proglottids showing indentation at 

 the genital pore. No genital atrium visible. 



Fig. loi. — Ophiotaenia grandis La Rue, mature proglottid, toto, ventral view 

 showing reproductive organs and ventral uterine pores. 



Fig. 102. — Ophiotaenia perspicua La Rue, ripe proglottid, toto showing uterine 

 pouches. 



Fig. 103. — Ophiotaenia filaroides La Rue, ripe proglottid, showing uterine 

 pouches and protruded cirrus. 



Fig. 104. — Ophiotaenia .filaroides La Rue, organs of interovarial space from 

 a reconstruction. After La Rue 1909. Through an error in lettering the lower 

 part of the vagina is marked 'od' whereas the fertilization passage beneath the 

 vagina should be marked 'od'. 'Ys* should read 'rs'. 



Fig. 105. — Ophiotaenia filaroides La Rue, mature proglottid, toto, unflat- 

 tened, showing relationships of organs. After La Rue 1909. 



