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DETAILS OF BOTRYDIUM GRANULATUM. 



1. The Vesicles of the natural size and appearance. 



2. The Vesicles after collapsing, forming a green confluent frond, the natural 

 size. 



3. The Frond enlarged, showing the hollows left by the collapsed vesicles. 



4. The Vesicles separate and magnified, showing their tubular shape and 

 fibrous termination. 



5. A Vesicle in its primary state, with the thin membranes that surround it, 

 magnified. 



6. Vesicles perfect after bursting through the membranes, with their granular 

 relics left on the surface, magnified. 



7. Cells or Oonidia, with their included granules or germs, magnified 200 times. 



8. The same farther magnified 500 times. 



9. Cells or Gonidia emptied of their contents, magnified 200 times. 



DETAILS OF THE RED ALGAL FROM THE 

 MANIFOLD. 



10. Crust or frond, blood-red, formed of innumerable confluent cells. 



11. Cells and their included granules, with the remains of the membrane that 

 at first covers them, magnified 200 times. 



