. Carnegie Institution of Washington publication. 196 THE BEHAVIOR OF LOWER ORGANISMS. given a very interesting account of the rolling up and ingestion of threads of Oscillaria by this species (see p. 223).* PURSUIT OF FOOD. Amoeba proteus does not always succeed in ingesting its food so easily as in the case just described (p. 194). There is, as noted above, a tendency for the food body to be pushed away by the forward move- ment at the anterior end of the Amoeba, and this sometimes gives serious difficulty. In such cases Amoeba may show what would be called in higher organisms remarkable per
. Carnegie Institution of Washington publication. 196 THE BEHAVIOR OF LOWER ORGANISMS. given a very interesting account of the rolling up and ingestion of threads of Oscillaria by this species (see p. 223).* PURSUIT OF FOOD. Amoeba proteus does not always succeed in ingesting its food so easily as in the case just described (p. 194). There is, as noted above, a tendency for the food body to be pushed away by the forward move- ment at the anterior end of the Amoeba, and this sometimes gives serious difficulty. In such cases Amoeba may show what would be called in higher organisms remarkable pertinacity in continuing its. FIG. 73. f attempts to ingest the food. This will be illustrated from a concrete case (Fig. 73). An Amoeba proteus was creeping toward an encysted Euglena. The latter was perfectly spherical and very easily moved, so that when the anterior edge of the Amoeba came in contact with it the cyst merely moved forward a little and slipped to one side (the left). The Amoeba *Leidy (1879, P- §6) gives a very similar account of the ingestion of filaments of algee in Dinamoeba. tFiG. 73.—Amoeba following a rolling Euglena cyst. Nos. 1-9 show successive positions occupied by Amoeba and cyst. See text for 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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