. Bulletin - United States National Museum. Science. THE OPALINID CILIATE INFUSORIANS. 55 Measurements. Larger individual. Smaller individual. Length of bodv mm. .03 .0193 .0097 .0009 mm. 0. 124 Width of bodv .0326 Lensjth of nucleus .02 Width of nucleus .00109 Diameter of endospherule Cilia line interval: Anterior .0011 .00215 Posterior .0037 The number of macrochromosomes is four. Protoopalina montana is a little broader in the posterior third of the body than is the usual P. hdeslinali^ and is more broadly rounded at the posterior extremity. It is a much smaller species, if we may jud
. Bulletin - United States National Museum. Science. THE OPALINID CILIATE INFUSORIANS. 55 Measurements. Larger individual. Smaller individual. Length of bodv mm. .03 .0193 .0097 .0009 mm. 0. 124 Width of bodv .0326 Lensjth of nucleus .02 Width of nucleus .00109 Diameter of endospherule Cilia line interval: Anterior .0011 .00215 Posterior .0037 The number of macrochromosomes is four. Protoopalina montana is a little broader in the posterior third of the body than is the usual P. hdeslinali^ and is more broadly rounded at the posterior extremity. It is a much smaller species, if we may judge from the one infection studied. The nuclei are relatively larger, are pear-shaped and connected by a thread, and usually each. a b Pig. 30.—Protoopalina Montana, X 460 diameters. will be found in a late anaphase condition, each daughter nucleus simulating an equatorial plate. Out of fifty-two individuals observed on one slide, forty-four showed the nuclei in this condition; six had the two nuclei farther apart, but still connected by a thread, and each showing either eight irregularly arranged chromosome masses or eight massiA'e chromosomes in two early anaphase groups of four each; one had its nucleus in a very much elongated and greatly con- stricted dumbbell condition, with four massive chromosomes in each of the developing daughter nuclei (fig. 30, a). The two daughter moieties were so far apart that one could almost as well call them distinct nuclei connected by a thread, the thread in this case, how-. 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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