. Elements of comparative zoology. Zoology. Fig. 6.—A flagellate Infusorian, Chilimonas paramoecium (after Biitschli). n, nucleus; oe, oesophagus; v, contractile vac- uole. Fig. 7.—A ciliated Infusorian, Stylo- nichia mytilus, in process of division (after Stein), a, anus; cv, contractile vacuole; m, mouth; ma, macronucleus; mi, micronucleus; nm, new mouth. cases the conjugating individuals are equal in size and the union is temporary, the essential feature being an exchange of nuclear material. Here we have the lowest expression of sexuality, but without differentiation of sex. With others th
. Elements of comparative zoology. Zoology. Fig. 6.—A flagellate Infusorian, Chilimonas paramoecium (after Biitschli). n, nucleus; oe, oesophagus; v, contractile vac- uole. Fig. 7.—A ciliated Infusorian, Stylo- nichia mytilus, in process of division (after Stein), a, anus; cv, contractile vacuole; m, mouth; ma, macronucleus; mi, micronucleus; nm, new mouth. cases the conjugating individuals are equal in size and the union is temporary, the essential feature being an exchange of nuclear material. Here we have the lowest expression of sexuality, but without differentiation of sex. With others the conjugating individuals are un- equal in size and the fusion is permanent, the resulting. 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 Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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