PLATE 5.— Confervoide^. 



Figure 



1 . Monostroma bullosa, Thuret. «, fragment of frond, with some cells empty , 



b, ciliated zoospores from the cells ; c, zoospore germinating. 



2. Viva Lactuca, L. a, fragment of frond ; b, small ciliated zoospores from ditto. 



3. Ditto, a, fragment of frond; b, ditto, with the cells nearly empty, showing the 



orifices by which the zoospores escape ; c, large zoospore ; d, zoospores ger- 

 minating. 



4. Enter omorpha clathrata, Grev. «, fragment of frond ; 6, zoospores from ditto; 



c, the same in germination. 



5. Stigeocloniiim protensurn, Kiitz. a and 5, fragments of branched filaments, 



b emitting zoospores, c,c ; d, germinating zoospores. 



6. TJlothrix mucosa^ Thur. a, b, fragments of filaments ; c, zoospores ; d, e, ditto 



germinating. 



7. (Edogonium vesication, Link, a, fragment of a filament ; b, ditto, breaking up 



and emitting a zoospore ; e, zoospore with a cro^vn of cilia ; d, e, germinating 

 zoospores ; /, membrane of a zoospore which has burst by a lid and discharged 

 small zoospores immediately after germination ; ff, fragment of a filament with 

 one cell containing a resting-spore ; h, fragment of a filament in an abnormal 

 state, containing globular bodies ; i, germinated zoospore containing similar 

 globular bodies. 



8. Ch(2tophora elegans, Ag. 



9. A fragment of the same, emitting zoospores. 



10. Conferva cerea, Dillw. «, fragment of filament, one cell of which has discharged 



its contents in the form of zoospores, b. 



1 1 . Conferva floccosa, Thur. a, filament breaking up ; 6, fragment of growing 



filament ; c, zoospores. 



12. Rhizoclonium obtusangulum, Kiitz. 



13. Cladophora glomerata, Kiitz. a, filament with one fertile branch; b, apex of a 



fertile branch discharging zoospores, c. 



14. Sjihceroplea annulina, Kiitz. a, growing filament ; b, filament with the con- 



tents converted into spores. 



15. Codimn tonientosum, Ag. a, apex of clavate branch, with fertile cell; 5, zoo- 



spores. 



16. Stau7'ocarpi(s gracilis, Hass.; conjugating filaments. 

 17-23. Spirogyra quinina, Kiitz.; 17, growing filament. 



18. Conjugating filaments, with spores. 



19. Ditto, with the spores germinating. 



20. Half- decomposed cell, with the contents converted into almost colourless bi- 



ciliated zoospores. 



21. Spore formed after conjugation. 



22. The same shortly before germination. 



23. A similar spore, with the contents converted into globular bodies. 



24. a and b, Spirogyra 1 with the contents converted into spiny globular 



bodies. 



25. Spirogyra quinina, Kiitz. ; imperfectly conjugated cells, with the contents con- 



verted mto globular bodies. 



26. Spirogyra nitida ; cell with nucleus, n. 



27. Spirogyra pellucida, Kiitz.; cell with nucleus, n, and gelatinous outer coat, s. 



28. Spirogtjra nitida, Kiitz., half-decayed, the contents partly changed into globular 



masses. 



