98 ILLINOIS BIOLOGICAL MONOGRAPHS [316 



PLATE V 



Fig. 12. Cross section, immature specimen of Notocotylus urbanensis. X 190. 



Fig. 13. Spines of Paramonostomum echinum, front view. X 700. 



Fig. 14. Notocotylus urbanensis, young specimen, partial lateral view. X95. 



Fig. 15. Paramonostomum echinum, ventral view. X 87. 



Fig. 16. Spines of Paramonostomum echinum, lateral view. X700. 



Fig. 17. Notocotylus urbanensis, immature stage, ventral view. X 150. 



Fig. 18. Notocotylus urbanensis, ventral view. X44. 



Fig. 19. Notocotylus urbanensis, young specimen, dorsal view. X120. 





