M ILLINOIS BIOLOGICAL MONOGRAPHS [364 



LIST OF NEW SPECIES 



PAGE 



Alassostoma magnum 66 



Alassostoma parvum 69 



Polystoma megacotyle 37 



Poly stoma microcotyle 39 



Polystoma opacum _ _ 34 



Polystoma orhiculare 31 



Zygocotyle ceratosa _ 72 



A preliminary description was given in the Journal of Parasitology, 

 3:21-27. 



