. Behavior of the lower organisms. Animal behavior; Invertebrates. THE BEHAVIOR OF AMCEBA 3 is repeated as long as the particles cling to the surface. Single particles have been seen to pass thus many times around the body of the animal. Diagrams of the movements of the particles clinging to the surface are shown in Figs. 4 and 5. It is not only the outermost layer of the ectosarc that thus moves forward. On the contrary, the whole substance of the Amoeba, from the. Fig. 5. — Diagram of the movements of a particle attached to the outer surface of Amceba verrucosa, in side view. In position 1 t
. Behavior of the lower organisms. Animal behavior; Invertebrates. THE BEHAVIOR OF AMCEBA 3 is repeated as long as the particles cling to the surface. Single particles have been seen to pass thus many times around the body of the animal. Diagrams of the movements of the particles clinging to the surface are shown in Figs. 4 and 5. It is not only the outermost layer of the ectosarc that thus moves forward. On the contrary, the whole substance of the Amoeba, from the. Fig. 5. — Diagram of the movements of a particle attached to the outer surface of Amceba verrucosa, in side view. In position 1 the particle is at the posterior end; as the Amceba pro- gresses, it moves forward, as shown at 2, and when the Amoeba has reached the position 3, the particle is at its anterior edge, at x. Here it is rolled under and remains in position, so that when the Amceba has reached the position 4, the particle is still at x, at the middle of its lower surface. In position 5 the particle is still at the same place x, save that it is lifted upward a little as the posterior end of the animal becomes free from the substratum. Now as the Amceba passes forward, the particle is carried to the upper surface, as shown at 6. Thence it continues forward, and again passes beneath the Amceba. outer surface to the interior of the endosarc, moves steadily forward as a single stream, only the part in contact with the substratum being at rest. At times small particles are at first attached to the outer surface, then gradually sink through the ectosarc into the endosarc. Through- out the entire process of sinking inward the movement is steadily for- ward. It is clear, then, that Amceba rolls, the upper surface continually pass- ing across the anterior end to form the lower surface. The anterior edge is thin and flat and is attached to the substratum, while the posterior. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colorat
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanimalbehavior, booky
