. Text book of zoology. Zoology. Glass 2. Infusoria. 95 Under the term Flagellata is included a lai-ge number of diverse unicellular animals, which are all, characterised by the possession of a single powerful â flageUum. These organisms do not, however, constitute A B 0 a natural division: some of them seem to be most closely allied to the Infusoria, and in any case undoubtedly belong to the Animal Kingdom. Others are certainly vege- table organisms, provided with chlorophyll (c/. p. 81), whilst yet others are of very doubtful position. Among the Flagellates possessing animal characters may b
. Text book of zoology. Zoology. Glass 2. Infusoria. 95 Under the term Flagellata is included a lai-ge number of diverse unicellular animals, which are all, characterised by the possession of a single powerful â flageUum. These organisms do not, however, constitute A B 0 a natural division: some of them seem to be most closely allied to the Infusoria, and in any case undoubtedly belong to the Animal Kingdom. Others are certainly vege- table organisms, provided with chlorophyll (c/. p. 81), whilst yet others are of very doubtful position. Among the Flagellates possessing animal characters may be mentioned the M o n a - dinidse, small organisms provided with one or several flagella at the anterior end, ocoui-ring in vast numbers in decaying substances and in the alimentary canal of various animals ; some species are invariably pre- sent in the stomach of the Ruminants, the oscum of the Pig, the rectum of Frogs and Toads; whilst some have been found in the alimentary canal of Fig. 54. Various Monadidas. A Cercomonas muscw (from the duodenum of the house-fly). B Bodo ovatus, C JSexamita rostrata. c contractile vacuole, n nucleus.âAfter Stein. Class 3. Gregarinida. The Gregarines which are, without exceptioiij parasitic, are, like the Infusoria, unable to protrude pseudopodia, but are distinguished from these, amongst other things, by the absence of cilia. The unicellular body is usually, although not always, surrounded by a definite coat: the protoplasm is usually divided into two layers, the inner granular and the outer clearer, not, however, sharply. 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 Boas, J. E. V. (Johan Erik Vesti), 1855-1935; Boas, J. E. V. (Johan Erik Vesti), 1855-1935. Lehrbuch der Zoologie. London, Sampson Low, Marston
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1896
