Thoughts On Animalcules Or a Glimpse of the Invisible World Revealed By the M
Thoughts On Animalcules Or a Glimpse of the Invisible World Revealed By the M
Gideon Algernon Mantell
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5, fig. 2). This creature has one eye, which is . Quadrangular, a respiratory tube, and trembling organs (branchice) in the interior. It is oviparous, and the eggs are attached to the body till the young are hatched. II. BAKER'S BRACHIONUS, (B. Bakeri, pi. Xii, fig. 2). The shell of the other species is scabrous or rough, with six unequal spines on the upper, and two very long lateral ones on the lower end ; its jaws are shewn in p. 55, fig. 2, a. These minute beings aggregate together in numbe...r- less myriads, so as to form whitish masses that float in the water; after the death of the animals the shells retain their form, and accumulate in layers at the bottom of pools, lakes, &c. STRATA OF LIME AND FLINT FORMED BY INFUSORIA. In many families of the polygastric Infusoria, the cases, or shells, consist either of lime, silex (flint), or iron ; and these retain their form and structure for un- limited periods of tune. From the inconceivable num- bers of these shell-animalcules which swarm in every body of water, whether fresh or salt, and the immense rapidity with which the species increase by spon- ANIMALCULES WITH SHELLS.
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