A cool Paternoster image:
Image from page 791 of “The animal kingdom : arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy” (1849)
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Identifier: animalkingdomar00cuvi
Title: The animal kingdom : arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy
Year: 1849 (1840s)
Authors: Cuvier, Georges, baron, 1769-1832 Metcalf Collection (North Carolina State University) NCRS Blyth, Edward, 1810-1873 Mudie, Robert, 1777-1842 Johnston, George, 1797-1855 Westwood, J. O. (John Obadiah), 1805-1893 Carpenter, William Benjamin, 1813-1885
Subjects: Animals
Publisher: London : Wm. S. Orr and Co., Amen Corner, Paternoster Row
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries
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Text Appearing Before Image:
ge ovaria. Besides the longitudinalmuscular bands, transverse lines may be observed to cross the body at intervals, which arebelieved by Ehrenberg to be blood-vessels, passing ofif from a trunk that runs along the back, likethe dorsal vessel of Insects. A distinct nervous system unquestionably exists in the Rotifera; thoughit cannot be seen in the Rotifer vulgaris so clearly as in some others of the group. The movements of these animals are very active and varied. Sometimes they attach themselves bythe tail, and set their ciliary apparatus in motion for the purpose of obtaining food; in which conditionthey bear a strong resemblance to Bryozoa. But they also swim freely about through the water, theciliary apparatus being folded up (as in Fig. 21, B), and they then resemble aquatic Worms. Andsometimes they crawl along a solid surface, after the manner of a Leech. Yet with all this complexorganization and these active powers, many Rotifera may be completely dried up, and preserved for an
Text Appearing After Image:
RADIATA. 707 indefinite perioJ, without the loss of their vitality; being revived again by moisture, and returning totheir original activity. Th-y reproduction of the Botifera is not accomplished by gemmation, nor by the subdivision of thebody, but only by eggs. Of these, not many are produced at once ; they attain a large size in propor-tion to the body of the parent (Fig. 21, *); and the development of the embryo often proceeds so farbefore the egg is extruded, that its ciliary movements are visible. The egg-capsule frequently burstswhen the egg is pxssing forth, so that the young may be said to be born alive; being capable of activelocomotion, and of obtaining its own food, as soon as it quits the body of the parent. Notwithstandingthat the number of eggs undergoing development at one time seldom exceeds three or four, the re-productive powers in this tribe are very extraordinary, in consequence of the rapidity with which theyoung arrive at maturity, and become the parents of a new
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