30 THE HANCOCK PACIFIC EXPEDITIONS VOL, 3 



EXPLANATION OF PLATE 



Plate 3 



Fig. 10. Gomphospkaeria aponina. x 1000. 



Fig. IL Microcoleus tenerrimus, end of a single trichome. x 2000. 



Fig. 12. M. tenerrimus, end of a typical filament, x 1000. 



Fig. 13. Lyngbya semiplena. x 1500. 



Fig. 14. Spirulina tenerrima. x 2000. 



Fig. IS. Schizothrix Hancockii, a filament showing false branching, x 1500. 



Fig. 16. Chroococcus turgidus. x 1000. 



Fig. 17. Calotkrix pilosa. x 900. 



