. The Protozoa. Protozoa. u8 THE PROTOZOA forms, disproved this view by showing that the coloring matter is quite distinct from diatomin and is peculiar to the Dinoflagellidia. He suc- ceeded in extracting three substances: (i) phycopyrrin, similar to the brownish red coloring matter of the Floridese and Phasophycacese among the plants, and like this, soluble in clear water; (2) peridinin, like chlorophyl soluble in alcohol, but of quite different spectrum; and (3) chlorophyllin, a substance more like chlorophyl, but difficult to isolate. The shape and size of the chromatophores vary considera
. The Protozoa. Protozoa. u8 THE PROTOZOA forms, disproved this view by showing that the coloring matter is quite distinct from diatomin and is peculiar to the Dinoflagellidia. He suc- ceeded in extracting three substances: (i) phycopyrrin, similar to the brownish red coloring matter of the Floridese and Phasophycacese among the plants, and like this, soluble in clear water; (2) peridinin, like chlorophyl soluble in alcohol, but of quite different spectrum; and (3) chlorophyllin, a substance more like chlorophyl, but difficult to isolate. The shape and size of the chromatophores vary considerably in different species, but are fairly constant for the same species. They increase by simple division. The pyrenoids, which seem to be the centre of starch formation, are sometimes quite naked (Euglena),. .... Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Calkins, Gary N. (Gary Nathan), b. 1869. New York, The Macmillan company; London, Mamcillan & co. , ltd.
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