. The Protozoa. Protozoa. A Fig. 4. — Flagellidia. [Stein.] A. Chrysomonas (Chromulina) fiavicans. Ehr. with chromatophores and an engulfed diatom (d). B. The same encysted. C. PAacus longicaudus viduals group themselves together, forming a colony or Plasmodium. In some cases the fusion is complete, in others the outlines of the individual Amoebas persist. In view of the questionable position which these forms occupy, there is some danger of their being neglected altogether, the botan- ists refusing them because of their animal characteristics, the zoolo- gists because of their plant-lik
. The Protozoa. Protozoa. A Fig. 4. — Flagellidia. [Stein.] A. Chrysomonas (Chromulina) fiavicans. Ehr. with chromatophores and an engulfed diatom (d). B. The same encysted. C. PAacus longicaudus viduals group themselves together, forming a colony or Plasmodium. In some cases the fusion is complete, in others the outlines of the individual Amoebas persist. In view of the questionable position which these forms occupy, there is some danger of their being neglected altogether, the botan- ists refusing them because of their animal characteristics, the zoolo- gists because of their plant-like features. No harm can be done by including them in both kingdoms, for on purely a priori grounds it is to be expected that some organisms should be on the boundary line between artificial groups such as the unicellular animals and plants. The present group and the Phytoflagellida among the Mastigophora appear to occupy such a position, and it is advisable to include them as provisional groups of the organisms with which they show the greatest number of common points. With our present knowledge,. 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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