PLATE VI.

PLUMATELLA JUGALIS and PLUMATELLA FRUTICOSA.

Fig. 1. Plumatella jugulis, attached to the under surface of a floating leaf of Sugittaria sagittifolia.

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 P. fruticosa.