Unpublished figures, corpora cavernosa, calcar and caecum [cecum] of platypus anatinus by Richard Griffin Three full-colour watercolour illustrations showing the corpora cavernosa (figure 1), the venom spur [calcar] (figure 2) and the caecum (figure 3) of the male platypus specimen as observed by Griffin during dissection. The page is labelled 'Plate 3'. Subject: Zoology / Physiology / Anatomy 1831