. The biology of the Protozoa. Protozoa; Protozoa. NUCLEI ANT) KTXETIC ELEMENTS 105 Collin (1909) and P>ntz (1909) record some observations which suggest their derivation from nuclei (Entz) or at least some connec- tion with them (Collin). A single basal body gives rise to a single cilium (Fig. 54) but groups of them are found at the bases of the more complicated membranes, membranelles and cirri the number varying with the species. Thus INIaier describes 2 in the mem- branelles of Nyctotheriis cordiformis and many of them arranged in a row in the membranelle of Stentor niger; in undulating
. The biology of the Protozoa. Protozoa; Protozoa. NUCLEI ANT) KTXETIC ELEMENTS 105 Collin (1909) and P>ntz (1909) record some observations which suggest their derivation from nuclei (Entz) or at least some connec- tion with them (Collin). A single basal body gives rise to a single cilium (Fig. 54) but groups of them are found at the bases of the more complicated membranes, membranelles and cirri the number varying with the species. Thus INIaier describes 2 in the mem- branelles of Nyctotheriis cordiformis and many of them arranged in a row in the membranelle of Stentor niger; in undulating mem- branes of the vorticellids Maier and Schroder describe 3 rows of basal granules while in the "paroral" and "endoral" membranes of Glaucoma scintiUans there are 5 and 10 rows of basal granules. 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, New York, Lea & Febiger
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