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  • Medicinal leech Hirudo verbena
  • Moutparts from medicinal leech Hirudo verbena
  • Cocoon from medicinal leech Hirudo verbena
  • Sea buckthorn plant (Hippophae rhamnoides) and nine types of leech (Hirudo species). Coloured etching by J. Pass, c. 1811.
  • Dissections comparing the stomachs of various species of animal: twelve figures. Line engraving, 1830/1870?.
  • A physician administers leeches to a patient; advertising Knoll diuretic medicine. Colour process print, 19--, after L. Boilly, 1827.
  • A physician administers leeches to a patient; advertising Knoll diuretic medicine. Colour process print, 19--, after L. Boilly, 1827.