. Text-book of zoology for schools and colleges. Zoology. Fig. 10.—Ciliated Infusoria. A. Param(scium, sbowin*? the nucleus («) i^nd two con- tractile vesicles (y); B. Piw(tm(Bcium bursaria (after Stein), dividing transversely, n Nucleus; »' nucleolus; t Contractile vesicle; 0. Paramoecium aureHa (after Ehren- berg), dividing longitudinally. creature, which may be found commonly in stagnant waters or in artificially-prepared infusions. The body is nearly quite transparent, and consists of three layers—1. A structureless, transparent, external film or pellicle; 2. A central mass of soft semi-fl
. Text-book of zoology for schools and colleges. Zoology. Fig. 10.—Ciliated Infusoria. A. Param(scium, sbowin*? the nucleus («) i^nd two con- tractile vesicles (y); B. Piw(tm(Bcium bursaria (after Stein), dividing transversely, n Nucleus; »' nucleolus; t Contractile vesicle; 0. Paramoecium aureHa (after Ehren- berg), dividing longitudinally. creature, which may be found commonly in stagnant waters or in artificially-prepared infusions. The body is nearly quite transparent, and consists of three layers—1. A structureless, transparent, external film or pellicle; 2. A central mass of soft semi-fluid sarcode; and 3. An intermediate layer of firm and consistent sarcode. The external membrane or cuticle is richly covered with minute vibrating hairs or cilia, which ap- pear, however, to be really derived from the middle layer. The cuticle is also perforated by the aperture of the mouth, which is continued into a short, funnel-shaped gullet. The gullet, however, is not continued into any distinct stomach, but opens directly into the soft, semi-fluid sarcode which con- stitutes the central abdominal cavity. The particles of food. 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 Nicholson, Henry Alleyne, 1844-1899. New York, D. Appleton and Co.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
