FIGURES 17–27. 17 in Marine red algae (Rhodophyta) of economic use in the algal drifts from the Yucatan Peninsula, Mexico

FIGURES 17–27. 17. Laurencia intricata. Medullary and cortical cells. Scale bar = 30 μm. 18–19. Yuzurua poiteaui var. gemmifera. 18. Habit. Scale bar = 3cm. 19. Pericentral, medullary and cortical cells. Scale bar = 120 μm. 20–21. Hypnea musciformis. 20. Habit. Scale bar = 2 cm. 21. Medullary and cortical cells. Scale bar = 120 μm. 22–26. Eucheumatopsis isiformis. 22. Habit. Scale bar = 4 cm. 23. Medullary filaments and cortical cells. Scale bar = 460 μm. 24. Mature cystocarp. Scale bar = 110 μm. 25. Tetrasporangium laterally attached. Scale bar = 25 μm. 26. Habit with smooth surfaces. Scale bar = 10 cm. 27. Meristotheca cylindrica. Habit. Scale bar = 4 cm.