Electron micrographs of lymphocystis skin lesions obtained from the walleye pike, Stizostedion vitreum, show viral particles of differing sizes and morphologies. Earlier studies have described only particles ranging in size from 200-250 m.mu. in diameter. New forms (65-100 m.mu. in diameter) intermingled among the large particles and also contained within the latter are now shown. Both forms are associated with a single inclusion body. The possible role of the small particle in the life cycle of the virus is discussed.