304 T. H, BUFFHAM ON ANTHERIDIA. 



tive organs usual in the Florideas, this beautiful plant produces 

 polysporangia containing sixteen large spores, and that these, 

 like the tetraspores, are asexual. 



Explanation op Plates. 



(Figs. 1-39 refer to antheridia.) 

 Plate XIII. 

 Fig. 1. Choreocolax Polysiphonice. — Part of surf ace x 200. 

 „ 2. Ditto. Portion of vertical section x 400. 

 „ 3. Harveyella mirabilis. — Antheridia in situ X 10. 

 „ 4. Ditto. Portion of vert. sec. X 200. 

 „ 5. Phyllophora rubens. — Antheridia in situ. Natural 



size. 

 „ 6. Ditto. Exterior view of cavity x 200. 



7. Ditto. Vert. sec. of same x 200. 

 „ 8. Cystoclonium purpurascens. — Part of transverse 



section x 200. The dark body is an unchanged 



cortical cell. 

 „ 9. SphcErococcus coronopifolius. — Surface X 400. 

 „ 10. Ditto. Sec. of same x 400. 

 „ 11. Gracilaria confervoides. — Piece of male filament 



X 20. 

 „ 12. Ditto. Surface view of cavity x 200. 

 „ 13. Bhodymenia palmata. — Surface x 200. 

 „ 14. Ditto. Sec. X 800. 



„ 15. Bh. Palmetta. — Two antheridia. Nat. size. 

 „ 16. Ditto. Surface X 200. 

 „ 17. Ditto. Sec. x 800. 



„ 18. Lomentaria articulata. — Part of trans, sec. x 400. 

 „ 19. Nitophyllum Gmelini. — Portion of male plant x 2. 

 „ 20. Ditto. Trans, sec. of bilateral process x 20. 

 „ 21. Ditto. Part of ditto x 200. 



Plate XIY. 

 Fig. 22. Delesseria alata. — Fragment of male plant. Nat. 

 size. 

 „ 23. Ditto. Trans, sec. of antheridium x 50. 

 „ 24. Ditto. Part of ditto x 400. 

 „ 25. D. ruscifoUa. — Male leaflet x 10. 

 , 26. Ditto. Sec. through two male spots x 50. 



