Image from page 398 of “General physiology; an outline of the science of life” (1899) – more Marine Life goodness curated by www.SardineRunPE.co.za
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Title: General physiology; an outline of the science of life
Year: 1899 (1890s)
Authors: Verworn, Max, 1863-1921 Lee, Frederic S. (Frederic Schiller), 1859-1939, ed. and tr
Publisher: London, Macmillan and co., limited New York, The Macmillan company
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons
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Fig. 173.—Dlffiugia. From the shell of sand-grains project three finger-like pseudopodia.A, Unstimulated ; B, stimulated by a gentle shock. (Fig. 173, B ); with a stronger shock the pseudopodia are frequentlydrawn with such force into the protoplasmic body, that their ends,being fastened to the support by means of a sticky secretion,are torn off. With stronger stimulation the change in thepseudopodia is much more pronounced than with feebler: theybecome not only wrinkled, but on their whole surface small drop-lets swell out from the smooth contour;2 the more the reactiondevelops, the larger become the droplets ; they flow together intoa myelin-like mass, and are distinguished clearly by a stronglyrefractive strand visible in the axis of the pseudopodium (Fig. 174);1 Of. Verworn (89, 1). 2 Gf. Fig. 156, p. 363. STIMULI AND THEIR ACTIONS 383 finally, the latter is wholly drawn in, and its mass mingles with therest of the body-protoplasm. Among the marine Polythalamia alsothere are man
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