328 ILLINOIS BIOLOGICAL MONOGRAPHS [328 



EXPLANATION OF PLATE 



Fig. 58. — Proteocephalus filicoUis (Rud.) =ambiguus (Dujardin), whole worm. 

 This figure and Figs. 59 and 60 were drawn from Schneider's toto preparation. 



Fig. 59- — Proteocephalus filicoUis (Rud.) ^ambiguus (Dujardin), mature pro- 

 glottid, toto. 



Fig. 60. — Proteocephalus filicoUis (Rnd.) =ambiguus (Dujardin), ripe pro- 

 glottid, toto. 



Fig. 61. — Proteocephalus esocis (Schneider), young proglottid, toto. Vagina 

 and cirrus-pouch could not be traced to margin of proglottid. 



Fig. 62. — Proteocephalus esocis (Schneider), mature proglottid, toto. 



Fig. 63. — Proteocephalus esocis (Schneider), outline of anterior end, posterior 

 end and middle of strobila. 



Fig. 64- — Proteocephalus perplexus La Rue, ripe proglottid, reconstruction 

 showing female reproductive organs, especially lateral pouches of uterus. 



Fig. 65. — Proteocephalus perplexus La Rue, ripe proglottids, reconstruction 

 showing male reproductive organs and the ovary. Note also the position of the 

 sphincter vaginae. Figs. 64 and 65 are drawn from the same series of sections. 

 Scale should read 0.5 mm. 



Fig. 66. — Proteocephalus cernuae (Gmelin), ripe proglottid, toto, showing es- 

 pecially the uterine pouches and the slender ovarian lobes. 



Fig. 67. — Proteocephalus cernuae (Gmelin), mature proglottid, toto. 

 Fig. 68. — Proteocephalus cernuae (Gmelin), old proglottid, toto. 



