. Evenings at the microscope : or, Researches among the minuter organs and forms of animal life . Zoology; Microscopy; Microscopes. 252 EVENINGS AT THE MICROSCOPE. to the slender filaments of water-grass, crowfoot, &c. It is about one fifty-fifth of an inch in length, pellucid, but tinged with brownish yellow. It appears to be of a gela- tinous texture, and is covered with foreign substances, such as decaying animal or vegetable mat- ters, which adhere to its surface. From the mouth of the tube protrudes a trans- parent colourless animal, the head of which is rounded, with the extremity pu
. Evenings at the microscope : or, Researches among the minuter organs and forms of animal life . Zoology; Microscopy; Microscopes. 252 EVENINGS AT THE MICROSCOPE. to the slender filaments of water-grass, crowfoot, &c. It is about one fifty-fifth of an inch in length, pellucid, but tinged with brownish yellow. It appears to be of a gela- tinous texture, and is covered with foreign substances, such as decaying animal or vegetable mat- ters, which adhere to its surface. From the mouth of the tube protrudes a trans- parent colourless animal, the head of which is rounded, with the extremity pursed up. Suddenly it unfolds its flower-like wheel, which consists of two broad nearly circular lobes united, the margin of which is set with strong cilia, much resembling those of the last species. Each cilium appears to be curved, and to be thickened at the middle—the optical expression of the ciliary wave; and the effect of the rotation, as each seems to pursue its fellows around the circular course down the dividing sinuosity, up the opposite sides, and round the margin again, is very striking. The cilia at the front are interrupted between the lobes. In ; the centre of each lobe is a broad plate, surrounded by a bright ring, and crossed by radiating lines, which also extend to- wards the ciliated margin; probably these are muscular filaments. The funnel is between the lobes, and leads by a short oesophagus, or gullet, to a bulbous transparent mastax, in which are seen jaws that work on each other. Below this is a long capacious sac, without convolutions or constrictions, but apparently granular in its texture. The alimentary canal is bent upwards through the whole length, terminating in an orifice behind the rotatory organ; for though I have not traced it when empty, I have seen the faecal matter driven rapidly upward as through a canal,. TWO-LIPPED Please note that these images are extracted from scanned page images that may have been digitally enhanced for
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