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Fig. 6. b, Enteromorpha tubulosa: a. Portion of an unbranched, hair-like filament, X l\b,z. small portion of a 
filament showing the cells arranged in rows and the single pyrenoid in each cell, X 82. c, Enteromorpha intestinalis: 
Three axes separated from a young tuft, X 6. d, e, Enteromorpha clathrata: d, A young, branched axis, X 15; an 
older axis with several uniseriate branchlets, X 80./, g, Chaetomorpha indka: f. Basal portions of filaments, X 80; 
g, upper portion, X 75. h-j, Chaetomorpha javanica: h. Basal portion of filament, X 60; /, middle portion showing 
cells dividing, X 60;/ older, upper portion, X 60. k, Chaetomorpha crassa: Small part of a coiled filament, X 8.5. 
/, Chaetomorpha antennina: Habit of a portion of a tuft, X 1.5. 
