28 THE HANCOCK PACIFIC EXPEDITIONS VOL. 3 



EXPLANATION OF PLATE 



Plate 2. 



Fig. 1. Merismopedia glauca f. mediterranea. x 1000. 



Fig. 2. Lyngbya gracilis var. monilis. x 1500. 



Fig. 3. Johannesbaptistia primaria, a typical filament, x 1000. 



Fig. 4. /. primaria, a filament showing gradation in width of cells, x 1000. 



Fig. 5. Oscillatoria laetevirens. x 800. 



Fig. 6. Lyngbya versicolor, x 800. 



Fig. 7. Hydrocoleum comoides, showing two trichomes within a sheath, x 600. 



Fig. 8. Lyngbya epiphytica on a filament of Hydrocoleum comoides. x 2500. 



Fig. 9. Hydrocoleum cantharidosmum. x 600. 



