Contributions to the Study of the Behavior of Lower Organisms No. 16
Contributions to the Study of the Behavior of Lower Organisms No. 16
H S Herbert Spencer Jennings
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A pseudopodium was formed at exactly this point, extending freely into the water, so that the particle was borne on the tip of the pseudopodium. It maintained this position while the pseudopodium was extending, and was still found at the tip after the pseudopodium had become long and slender (Fig. 48) . The third example which I give is one of much interest, because it shows the movements of a given point on the surface in both the retrac- tion and extension of pseudopodia, as well as in transf...erence from the posterior to the anterior region of the body. 3. Amaba proteus: When first observed the animal was rather slender, creeping in a certain direc- tion, and with two long pseudo- podia at the posterior end, extend- ing, one on each side, at right angles to the axis of progression (Fig. 49, a). The left pseudo- podium was the longer, and bore at about one-fourth its length from its base a small particle (x) at- FiG. 48.* tached to its surface by a very short stalk in such a way that it was seen in profile (Fig.
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