The royal natural history . RADIOLARIANS. INFUSORIANS, 563. mail-coated flagellata (highly magnified). Flagellated Infusouians,—Order Flagellata. The characteristic of the group is the possession of one or two flagella, or small-whip-like appendages, at the base of which is an opening in the denser surface-layer of protoplasm; a nucleus and contractile vacuoles are present, and frequentlya brilliant red spot of pigment, known as the eye-spot. The Monads, which arethe simplest members of the group, arecommon in fresh water and in infusions ;typical forms consisting of a sphericalor oval cell pr
The royal natural history . RADIOLARIANS. INFUSORIANS, 563. mail-coated flagellata (highly magnified). Flagellated Infusouians,—Order Flagellata. The characteristic of the group is the possession of one or two flagella, or small-whip-like appendages, at the base of which is an opening in the denser surface-layer of protoplasm; a nucleus and contractile vacuoles are present, and frequentlya brilliant red spot of pigment, known as the eye-spot. The Monads, which arethe simplest members of the group, arecommon in fresh water and in infusions ;typical forms consisting of a sphericalor oval cell provided with a species contain chlorophyll, and areclaimed by the botanists. The commonVolvox, for instance, which forms a green-coloured, spherical colony of monad cellshas been described as a plant and also asan animal by botanists and zoologistsrespectively. The animal and vegetablekingdoms converge downwards towards a common point, at which it is difficult to say whether the manifestations of thephysical basis of life— protoplasm
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectzoology
