PLATE VI 



Plumatella jugalis and Plumatklla fruticosa. 



Fig. 



1 . Plumatella jugalis, attached to the under surface of a floating leaf of Suyittaria xaiixHifulia. 



Natural size. 



2. The same magnified. 



3. Plumatella fruticosa, attached to the petiole of Sagittaria. Natural size. 



4. Portion of the same magnified. 



5. Statoblast of /'.//•«^ico5a. 



