Text-figures and line-drawings of the greater number of the fungi mentioned in the text have been included in the book. It is impossible to supply colour pictures of a high quality in a book such as this without raising the price of the publication astronomically. The plates in six easily obtainable popular books have been used to represent whenever possible the fungus described in the text, as accurate colour illustrations are very useful in identification. The titles of these books have been abbreviated for clarity. _Abbreviations for illustrations used throughout the text_ F--Findlay, W. P. K. (1967), _Wayside and Woodland Fungi_, London. Hvass--Hvass, E. & H. (1961), _Mushrooms and Toadstools in Colour_, London. LH--Lange, M. & Hora, F. B. (1963), _Collins Guide to Mushrooms and Toadstools_, London. NB--Nicholson, B. E. & Brightman, F. H. (1966), _Oxford Book of Flowerless Plants_, Oxford. WD--Wakefield, E. & Dennis, R. W. G. (1950), _Common British Fungi_, London. Z--Zeitlmayr, L. (1968), _Wild Mushrooms_, London. (iii) Fairy rings _Object_: To assess the annual radial growth of fairy-rings and to correlate this with any obvious environmental change. _Materials_: Graph and tracing papers, tape-measures, note-book, pencil and rule, small pieces of cane about four inches long and coloured dye (e.g. Eosin solution, Janus Green). _Method_: Select a fairy-ring on the school cricket pitch or hockey pitch, school lawn, local golf course or park at a time when the fruit-bodies are first visible. Carefully mark the centre of the ring by driving into the soil a piece of cane until the top is only just visible. Plot this point on graph paper and relate it to any prominent feature nearby, e.g. post, tree or hedge. Carry out weekly observations throughout the fruiting season plotting the individual fruit-bodies on tracing paper, which is trimmed so as to make a replica of the original graph-sheet. A small dab of coloured dye placed on a fruit-body will assist one in recognising fruit-bodies from previous observations. During the fruiting season observe and plot the zones of differently coloured vegetation--devise some method of describing (and measuring) these colours perhaps by comparison with a colour-chart, printed or hand prepared. Continue observations on the ring at monthly or fortnightly intervals after the disappearance of the fruit-bodies, and record subsequent changes in the vegetation for twelve months. This project can be continued for several years and for different species of fungus. Weather conditions may be noted simultaneously with the growth observations, or obtained from a reliable source of similar information close by. In this way not only is the increase in ring size measured but the results can be considered in the light of climatic data; fungal growth appears to be dependent on favourable weather conditions. _Further experiments_: