Contributions to the Study of the Behavior of Lower Organisms
Contributions to the Study of the Behavior of Lower Organisms
H S Herbert Spencer Jennings
The book Contributions to the Study of the Behavior of Lower Organisms was written by author H S Herbert Spencer Jennings Here you can read free online of Contributions to the Study of the Behavior of Lower Organisms book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Contributions to the Study of the Behavior of Lower Organisms a good or bad book?
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F OTHER SPECIES OF AMOEBA. Thus far we have dealt only with AmoebaB of rather constant form, which do not produce pseudopodia, or only rarely do so. We must now take up species in which the form is changeable and the movements varied. Of such species I have studied chiefly Amoeba Umax, A. Proteus, and a smaller Amoeba, which I take to be Amoeba angulata Meresch. In these species the outer surface is not viscid, except at the posterior end, so that small objects rarely cling to it. It is, theref...ore, much more difficult to determine the direction of movement of the upper surface than in Amoeba verrucosa and its relatives. Yet, by mixing soot with the water, and devoting a sufficient amount of time and patience to the work, one can obtain as many observations as he desires. The soot settles upon the upper surface in particles or masses *FiG. 44. Side view (partlj an optical section) of a creeping Amoeba verru- cosa, showing the thin anterior edge (/4) attached to the substratum, and the high posterior portion (/-*) with a cavity beneath it.
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