Two New Species of Myxozoa, \u3ci\u3eMyxobolus inaequus\u3c/i\u3e sp. n. and \u3ci\u3eHenneguya theca\u3c/i\u3e sp. n. from the Brain of a South American Knife Fish, \u3ci\u3eEigemannia virescens\u3c/i\u3e (V.)

Two new species of Myxozoa from the brain of the green knife fish Eigemannia virescens are described: Myxobolus inaequus sp. n. has an unusually large spore body and extremely unequal polar capsules, and Henneguya theca sp. n. has an attenuated spore encased in a sheath not previously described in other Myxozoa. Only spores of the two species were observed, and infections caused no obvious pathological changes in the brain