. Contributions to the study of the behavior of lower organisms. Physiology, Comparative; Infusoria; Amoeba; Irritability. Fig. 68. t Fig. forward movement ceased on the side x and increased at j)/, the pseudo- podium X contracted, and its endosarc passed into j^'. The animal then continued its course in the direction indicated by y. It had thus changed its path so as to avoid the obstacle presented by the filament. Such cases are often seen. * " Hindernissen weichen dieselben nicht aus " (/. c, p. 11). tFiG. 68.—An Amoeba moving in the direction shown by the arrows in the unbro
. Contributions to the study of the behavior of lower organisms. Physiology, Comparative; Infusoria; Amoeba; Irritability. Fig. 68. t Fig. forward movement ceased on the side x and increased at j)/, the pseudo- podium X contracted, and its endosarc passed into j^'. The animal then continued its course in the direction indicated by y. It had thus changed its path so as to avoid the obstacle presented by the filament. Such cases are often seen. * " Hindernissen weichen dieselben nicht aus " (/. c, p. 11). tFiG. 68.—An Amoeba moving in the direction shown by the arrows in the unbroken outline is stimulated by drawing the tip of a glass rod along one side, from a to b. Thereupon a pseudopodium bursts out of the opposite side, as shown by the broken outline, and the Amceba continues locomotion in the direc- tion so indicated. J FiG. 69.—Method by which Amoeba avoids an obstacle. The Amoeba a-b-c-d comes in contact at c with the end of a filament. Thereupon motion at c ceases, while elsewhere it continues, so that after a time the Amoeba has the position shown by the broken outline. Then the currents become changed in x; its sub- stance passes into the pseudopodium j, and the Amoeba continues to move in the direction indicated by the arrows in the lower 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 Jennings, H. S. (Herbert Spencer), 1868-1947. Washington : Carnegie Institution of Washington
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