PLATE VIII.

PLUMATELLA DU Mo RTIERI and PLUMATELLA ELEGANs.

Fig.

1. Plumasella Dumortieri, attached to a submerged stem. Natural size. 2. Portion of the same magnified. 3. End of a branch, with the polypide retracted, still further magnified, to show the trans

parent furrow in the ectocyst, with its notch-like extremity. Portion of the calyx of the same, much magnified, to show its festooned margin. Statoblast of the same. Plumatella eleyans, attached to the under surface of a leaf of Potamo/eton. Natural size. Portion of the same magnified. Portion of the calyx of the same, much magnified, to show its nearly even margin. Statoblast of the same.

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