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PLATE X.
Paludicella Ehrenbergi.

Fig.

1. Paludicella Ehrenbergi, attached to a submerged stone. Natural size.

2. A portion of the same magnified.

3. A very much enlarged drawing of a cell with the polypide retracted; showing the

anatomical details.

4. A cell seen in section with the polypide exserted, and exhibiting anatomical details. The

ovary and testis are here fully developed, while in fig. 3 they are represented in an undeveloped state.

5. Lophophore viewed upon the upper surface, with the mouth, and roots of the tentacula.

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