Fig. 1. 2. 3. 4. 5. 6. 7, 8. 9. 10. PLATE VII. PLUMATELLA CORALLOIDES and PLUMATELLA EMARGINATA. Plumatella coralloides, growing upon a piece of submerged timber. Natural size. Portion of the same magnified. Base of a branch of P. coralloides, with an imperfect septum. Statoblast of P. coralloides. Plumatella emarginata, creeping over the surface of a submerged stone. Natural size. Portion of the same magnified. Free statoblast of P. emarginata. Adherent statoblast of the same. A row of adherent statoblasts, with the unorganized cement which attaches them to the walls of the cell. |