28 Conchocelis. 



EXPLANATION OF PLATE VIII. 



Prepared from specimens decalcified by Percnyt's solution. 



Figs, i and 2. Young plants taken from a part of the shell very little attacked 

 by the Alga ( x 250). 



Fig. 3. Portion of the horizontal network at a more advanced period ( x 250). 



Fig. 4. Portion of the vertical filaments ( x 250). 



Fig. 5. Various stages in the development of the inflations, showing the 

 chromatophores. 



Fig. 6. Portion of an inflation with spores. 



