. Studies in animal life . Zoology; Nature study. STUDIES IN ANIMAL LIFE. 29 plained rather than fly to spontaneous generation. And they were right. The mystery has at length been cleared up.* I wlU endeavor to bring togeth- er the scattered details, and narrate the curious story. Under the eyelids of geese and ducks may, be constantly found a parasitic worm (of the Trematode order), which naturalists have christened Monosto- mum mutabile—Single-mouth, Changeable. This worm brings forth living young, in the likeness of active Infusoria, which, being covered with cOia, swim about in the water a
. Studies in animal life . Zoology; Nature study. STUDIES IN ANIMAL LIFE. 29 plained rather than fly to spontaneous generation. And they were right. The mystery has at length been cleared up.* I wlU endeavor to bring togeth- er the scattered details, and narrate the curious story. Under the eyelids of geese and ducks may, be constantly found a parasitic worm (of the Trematode order), which naturalists have christened Monosto- mum mutabile—Single-mouth, Changeable. This worm brings forth living young, in the likeness of active Infusoria, which, being covered with cOia, swim about in the water as we saw the Opalina swim. Here is a portrait of Fig. 4—A, Embeyo of Monostomitm MirriBrLB. B, Gercaria sac, just set free. a, mouth; &, pigment spots; c, sac—^magnified. Each of these animalcules develops a sac in its interior. The sac you may notice in the engraving. * By Von Siebold. See his interesting work, Ueber die Band- nnd-Blasentviirmer. It has been translated by Huxley, and ap- pended to the translation of Kuechenmeisiek on Parasites, pub- lished by the Sydenham 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 Lewes, George Henry, 1817-1878. New York : Harper
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectn, booksubjectzoology
