. Elements of zoölogy : a textbook. Zoology. THE Infusoria or Ciliata are now regarded as the high- est representatives FlG- 742- of the Protozoa, ex- cepting only the sponges. Two or three forms will give the student a general idea of this group. Those called Yor- c ticellse, or the Bell- vorticeiia. shaped animalcules (Fig. 742) are common on aquatic plants. They are in the form of cili- ated bells mounted on long stalks. They are visible to the naked eye. th The Trumpet animalcules (Stentor polyinorplius, Ehren., p Fig. 739) secretes a sort of tube into which it contracts when disturbed—whi
. Elements of zoölogy : a textbook. Zoology. THE Infusoria or Ciliata are now regarded as the high- est representatives FlG- 742- of the Protozoa, ex- cepting only the sponges. Two or three forms will give the student a general idea of this group. Those called Yor- c ticellse, or the Bell- vorticeiia. shaped animalcules (Fig. 742) are common on aquatic plants. They are in the form of cili- ated bells mounted on long stalks. They are visible to the naked eye. th The Trumpet animalcules (Stentor polyinorplius, Ehren., p Fig. 739) secretes a sort of tube into which it contracts when disturbed—which Dr. Packard calls an anticipation in nature of the worm in its tube. One of the most simple and most common forms of Infusoria is Paramecium (Fig. 741, from Clark's "Mind in Nature"), which is hardly more than a particle of protoplasm, repre- senting, perhaps, only a single cell. Yet it is regarded as having a so-called mouth, digestive cavity, Paratnecium cmtilatum, Ehrenberg —Magnified. 3, radiating canals of cv' ; r. repro- ductive organic, vibrating 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 Tenney, Sanborn, 1827-1877. New York : Scribner
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