Schlange, Grass Snake by Paul Pfurtscheller, 1909ABOUT Antique Vintage wall chart of the anatomy of the "Tropidonotus natrix", (today: European grass snake or ringed snake, 'Natrix natrix'). Lithograph on two sheets of paper, mounted on canvas. Author and illustrator was Prof. Dr. Paul Pfurtscheller. Pfurtscheller (1855 1927) produced a series of 39 "Zoologische Wandtafeln" (zoological wall plates) to be used for higher educational purposes. Although he was a modest high school teacher by training