beundring opfindelse Vandret ring speculum Revolutionerende junk Gæsterne
Ring Holding Adjustable Speculum - Focus Instruments
Plate P1. Specimens of Distephanus speculum speculum forma cylindrus n.f. from Holes 747A and 1140A (scale bar = 10 mm). 1a, b. Holotype (Sample 183-1140A-1R-5, 26-27 cm); (a) apical ring in focus, (