. The biology of the protozoa. Protozoa; Protozoa. Fig. 197. — Myriaphrys paradoxa (?), with cilia arid axopodia. (After Penard. Monomastix (-Hiatus described by Schewiakoff. The possibility of the derivation of ciliates from flagellates, in some cases through Heliozoa-like forms, is suggested by such types, but origin of this group involves far too much speculation for serious consideration. Cilia, by fusion, form locomotor organs of complex nature (see Chapter IV). Undulating membranes, meinbranelles and cirri are present in the majority of ciliates. A fourth type of combination, membranulae
. The biology of the protozoa. Protozoa; Protozoa. Fig. 197. — Myriaphrys paradoxa (?), with cilia arid axopodia. (After Penard. Monomastix (-Hiatus described by Schewiakoff. The possibility of the derivation of ciliates from flagellates, in some cases through Heliozoa-like forms, is suggested by such types, but origin of this group involves far too much speculation for serious consideration. Cilia, by fusion, form locomotor organs of complex nature (see Chapter IV). Undulating membranes, meinbranelles and cirri are present in the majority of ciliates. A fourth type of combination, membranulae or pectinelles, combines several of the features of flagella. Thus the powerful motile organs of Didinium are composed of a few flagella-like, long cilia, while rhizoplasts run from their basal bodies to the vicinity of the nucleus (Fig. 98, p. 187). Undulating membranes are limited regionally, to the gullet, margin of the mouth or to a circumscribed area called the peristome. Meinbranelles are grouped usually in a curved row, the "adoral. 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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