Discussion pages are reached by clicking on the question mark icon in the upper left-hand corner of the pages that have them. These offer further information on a particular topic. In the Natural History of the Fungi the discussion pages have the specific purpose of explaining choices offered on navigation pages. In other places, such as the illustrations of fungi in the Checklist of New Brunswick mushrooms they will lead to additional information but are not related to navigation. For example, the picture of Coprinellus micaceus has a discussion page offering more photos of this species.