FIGURE 2. A, D. Cestode (A) and nematodes (D) on oversized blue and white-opaque glass plates, respectively; before 1901 by Borchmann (A) and 19th century by an unknown person (D). Specimen in A without coverslip. B, C, E, G. Histological sections of flatworms (B, E, G) and oligochaete (C) on oversized glass plates; before 1927 by Schulze (B), before 1897 by Michaelsen (C), before 1914 by Böhmig (E), and in the 1980s in DPX in the lab of Sluys (G). Label in C glued and covered with mounting medium. Self-adhesive label in G with glue having migrated through the label indicated by dark spots on the surface of the label. F. Hirudinea on large glass plate with top glass bars; before 1917 by Weltner. Notice yellowed mounting medium in periphery of coverslips in B–F. H. Cestodes on painted pieces of glass; middle of the 19th century by Küchenmeister. A–H: macro lens. Scalebars: A–H, 5 cm.