338 ILLINOIS BIOLOGICAL MONOGRAPHS [338 



EXPLANATION OF PLATE 



Fig. io6. — Ophiotaenia trimeresuri (Parona), evaginated cirrus, cirrus-pouch 

 and vagina. Note coils of ductus ejaculatorius in the swollen cirrus. Scale should 

 read 0.3 mm. 



Fig. 107. — Ophiotaenia trimeresuri (Parona), cirrus-pouch and vagina, cirrus 

 unprotruded. Note coils of ductus ejaculatorius in the cirrus-pouch. Scale should 

 read 0.3 mm. 



Fig. 108. — Ophiotaenia trimeresuri (Parona), mature proglottid, toto. Uterine 

 pouches just beginning to form. 



Fig. 109. — Ophiotaenia calmettei (Barrois), mature proglottid, toto. Uterine 

 pouches more advanced than in Fig. no. 



Fig. no. — Ophiotaenia calmettei (Barrois), mature proglottid, toto. Begin- 

 nings of uterine pouches may be seen. 



Fig. III. — Crepidobothrium gerrardii (Baird), mature proglottid, toto. From 

 lot 10.179 Ward Collection. 



Fig. 112. — Crepidobothrium gerrardii (Baird), ripe proglottid, toto. From lot 

 08472 Ward Collection. 



Fig. 113. — Crepidobothrium gerrardii (Baird), nearly mature proglottid, toto. 

 Note the great number of testes. From lot 10.190 W^ard Collection. 



Fig. 114. — Crepidobothrium gerrardii (Baird), mature proglottid, toto. Cirrus 

 protruded. Drawn from slide No. 1858, Bureau of Animal Industrj\ Washington. 



Fig. 115. — Crepidobothrium gerrardii (Baird), mature proglottid, toto. 



