. Bulletin - United States National Museum. Science. 72 BULLETIN" 120, UISTITED STATES NATIONAL from Concepcion, Chile, no date given; T. Barbour, collector. Two other individuals wore opened; one contained numerous Zelleriella danvinii; the other contained no Opalinids. Measurements of an individual of the prevalent sort.—Length of body mm.; width of body mm.; thickness of body mm.; length of nucleus mm.; width of nucleus mm.; diameter of endospherule mm.; cilia line interval, anterior mm.; posterior mm. Massive chro- mosomes
. Bulletin - United States National Museum. Science. 72 BULLETIN" 120, UISTITED STATES NATIONAL from Concepcion, Chile, no date given; T. Barbour, collector. Two other individuals wore opened; one contained numerous Zelleriella danvinii; the other contained no Opalinids. Measurements of an individual of the prevalent sort.—Length of body mm.; width of body mm.; thickness of body mm.; length of nucleus mm.; width of nucleus mm.; diameter of endospherule mm.; cilia line interval, anterior mm.; posterior mm. Massive chro- mosomes six in number. This is a small species. Most of the individuals in my infection are of the sort shown in figure 42, c. The body is alwaj^s sharply pointed behind, but there is no naked spinelike proc- ess. The nuclei are spindle- shaped, and in all but a few individuals are seen to be in an anaphase stage, show- ing clearly six massive chromosomes. Granular chromosomes can also be seen, but the preparations are not sufficiently clear to allow counting them. A few individuals are found, with oval nuclei (fig. 42, a) in which the chromosomes seem to be fragmented, probably passing from a reticulate stage into active mitosis. A very few others are found with nuclei as shown in figure 42, h. Portions of the excretory vacuole are often seen, especially around the nuclei. a. 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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