The Animal Parasites of Man by Fantham, Braun, Stephens, and Theobald
3. A reaction on the part of the host cell results, for nucleolar,
plastin substance is extruded from the cell-nucleus and surrounds the
parasitic initial body. The latter is thus enveloped in a mantle (hence
the name Chlamydozoa, from χλαμὑς, a mantle), and the characteristic
cell-inclusion (Guarnieri’s body, Negri’s body, etc.) is produced. The
nucleolar, mantle substance probably represents the “cytoplasm” of
_Cytoryctes_, described by Calkins.