294 EXPLANATION OF THE PLATES. 



Fig. 5. A mass of sporules, some arranged in bead-like rows. 

 Fig. 6. Sporules isolated of different forms. 

 Fig. 7. Branch of the plant giving off sporules. 



Fig. 8. Portion of the plant found growing on the skin of the gold-fish, a Transparent vesicular nu- 

 cleus ; 6 cells full of granules ; c cells more or less empty ; d the non-cellular filaments. 



Fig. 9. Portions of cellular tubes more or less matted together ; some full of granules, others empty and 

 collapsed. 



Figs. 10. and 11. Other portions of the cellular tubes isolated. In fig. 11. two nuclei are seen in one 

 cell. 



Fig. 12. A mesh of the non-cellular filaments, a Amorphous, firmly granular, matter ; 6 a filament ap- 

 parently interrupted. 



Fig. 13. Non-cellular filaments, magnified 650 diameters, shewing the delicate sheath which invests them. 



All the above figures, with the exception of Jig. 13., exhibit the structures as they appear when magnified 



250 diameters. 



