Nucleus Showing Chromatic Filaments
Diagrams of the nucleus showing the arrangement of chief chromatic filaments. A, Viewed from the side, the polar end being uppermost. Labels: p.c.f., primary chromatic filaments; n, nucleolus; n.o.m., node of meshwork. B, Viewed at the polar end. Labels: l.c.f., lopped chromatic filament; i.f., irregular filament.
Baker, W. Morrant & Harris, Vincent Dormer Kirkes' Hand-book of Physiology, 13th ed. (Philadelphia: P. Blakiston's Son & Co., 1892) 13