. Contributions to the study of the behavior of lower organisms. Physiology, Comparative; Infusoria; Amoeba; Irritability. ^^^«*i; '^W^'. revolving on its long axis. When, as a consequence of stimulation, it swings its anterior end toward the side J^, this movement is combined * Fig. 80 —Diagnuns of the movements in a reaction to a stimulus in an infu- sorian, Paramecium (/I), and in a rotifer, Anursea(i?). The anterior end swings about in a circle (turning continually toward the aboral or dorsal side). It thus tries many different directions, at the same time receiving samples of water from e


. Contributions to the study of the behavior of lower organisms. Physiology, Comparative; Infusoria; Amoeba; Irritability. ^^^«*i; '^W^'. revolving on its long axis. When, as a consequence of stimulation, it swings its anterior end toward the side J^, this movement is combined * Fig. 80 —Diagnuns of the movements in a reaction to a stimulus in an infu- sorian, Paramecium (/I), and in a rotifer, Anursea(i?). The anterior end swings about in a circle (turning continually toward the aboral or dorsal side). It thus tries many different directions, at the same time receiving samples of water from each of these directions, i, 2, 3, 4, 5, the successive positions taken, with the currents of water at the anterior ends. If the stimulus ceases the organism may stop in any of these positions, and swim forward in the direction so indi- cated. (The backward swimming, which precedes or accompanies the turning, is not represented.). 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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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphysiol, bookyear1904