. The Protozoa. Protozoa. 8o THE PROTOZOA The nature and the number of pseudopodia have frequently been used as a method of identification of certain species of Rhizopoda. Amoeba polypodia, A. radiosa, and A. proteus have certain characteris- tic pseudopodial structures which are seemingly of diagnostic value, yet A. proteus under the influence of a constant electric current can be made to assume the forms characteristic of A. polypodia and then. c x. JL .â $>»&»*SJ%, -B ;-/z. - jj â¢:*.â¢- i-nta rJf- **t gg-t-J* i ^"iy Fig. 44. â Types of pseudopodia. /4. Amxba limicola Rhmb. [R
. The Protozoa. Protozoa. 8o THE PROTOZOA The nature and the number of pseudopodia have frequently been used as a method of identification of certain species of Rhizopoda. Amoeba polypodia, A. radiosa, and A. proteus have certain characteris- tic pseudopodial structures which are seemingly of diagnostic value, yet A. proteus under the influence of a constant electric current can be made to assume the forms characteristic of A. polypodia and then. c x. JL .â $>»&»*SJ%, -B ;-/z. - jj â¢:*.â¢- i-nta rJf- **t gg-t-J* i ^"iy Fig. 44. â Types of pseudopodia. /4. Amxba limicola Rhmb. [RHUMBLER.] B. Amceba blattce Butsch. [BUTSCHLI.] C. Lie- berkiihnia sp. [VERWORN.] Z5. Actinospharium [ORIGINAL.] x, axial filament. of A. Umax. Conversely, A. Umax, when placed in an alkaline solu- tion of potassium hydrate, becomes transformed into A. proteus, and later, into A. radiosa (Verworn, '94). When a change in the surround- ing medium can so affect the protoplasm that the entire character of pseudopodia-formation is altered, the specific value of pseudopodia alone may well be questioned, and species based upon such a variable. 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 Calkins, Gary N. (Gary Nathan), b. 1869. New York, The Macmillan company; London, Mamcillan & co. , ltd.
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