. The biology of the protozoa. Protozoa; Protozoa. 400 BIOLOGY OF THE PROTOZOA form stalked cysts within which they undergo a metamorphosis. If hosts and cysts are eaten by an actinian the metamorphosed ciliates are liberated and these take up life again in the gastral cavity of the coelenterate. Of the endoparasitic forms the Pycnothricidae (Xicollelidae of Chatton and Perard) are noteworthy because of the varying posi- tions of the mouth, which is connected with an elongated furrow. Please note that these images are extracted from scanned page images that may have been digitally enhanced for
. The biology of the protozoa. Protozoa; Protozoa. 400 BIOLOGY OF THE PROTOZOA form stalked cysts within which they undergo a metamorphosis. If hosts and cysts are eaten by an actinian the metamorphosed ciliates are liberated and these take up life again in the gastral cavity of the coelenterate. Of the endoparasitic forms the Pycnothricidae (Xicollelidae of Chatton and Perard) are noteworthy because of the varying posi- tions of the mouth, which is connected with an elongated furrow. 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. Philadelphia, Lea & Febiger
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