Assertion: burbot's body | /r/CapableOf | behave like independent being
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text: Siebold observed the embryos (miracidia) of the Cyclocœlum (Monostomum) mutabile, and discovered in their interior a cylindrical body that behaved like an independent being (“necessary parasite”), and was so similar in appearance to the “royal yellow worms” (Bojanus) that Siebold considered the origin of the latter from the embryos of trematodes as, at all events, possible.