The _Canth. cibarius_ is very abundant about Rome, where it fetches, not being in great esteem, from twopence to twopence halfpenny a pound. AGARICUS ATRAMENTARIUS, _Bull._ PLATE IX. FIGS. 1 AND 2. Subgenus COPRINUS, _Fries_. _Bot. Char._ _Pileus_ fleshy, campanulate, margin uneven, colour greyish, then light brown, slightly hairy, often corrugated, sometimes scaly in the centre. _Gills_ numerous, deep, with clear veins, light brown, black in age, the edges grey or white, free, obtuse behind. _Stem_ about four inches high, swollen at the base, piped, juicy, fibrous, marked with bands. This is a common fungus in gardens, waste corners of fields, and lanes, and occasionally growing on stumps of trees in such situations: it is gregarious and cæspitose, and occurs both in spring and autumn. Young specimens afford a fine ketchup. AGARICUS COMATUS. PLATE VII. FIGS. 1, 2, AND 3. Subgenus COPRINUS, _Fries_. “A fungus in great request about Via Reggio and Lucca.”—_Puccinelli._ _Bot. Char._ _Pileus_ cylindrical, breaking up into long scales, campanulate, epidermis thin, flesh thick in the centre, very thin and stringy at the margins. _Gills_ numerous, quite free, leaving a space round the top of the stem. _Stem_ from four to five inches high, rather bulbous at the base, stuffed with fibres, brittle, ring moveable. This fungus may be found from early spring till late in the autumn, in meadows and waste places. When used for making ketchup or for the table, only young specimens should be selected. AGARICUS HETEROPHYLLUS, _Fries_. PLATE III. FIGS. 3 AND 4. Subgenus RUSSULA, _Scopoli_. MILD RUSSULÆ. RUSSULÆ MITES, AUCT. “Non meno sicuro e gustoso del Cesareo e del l’orcino.”—_Vitt._ It is of the utmost importance that those who gather funguses for the table, should be accurately acquainted with the different species composing this genus; its members are so abundantly distributed; some of them form so excellent and delicate a food, whilst others produce such deleterious effects on the economy, that they are well entitled to a diligent and careful attention. The limits of this work will not permit an accurate discrimination of all the species, which would require a long monograph to themselves; but I have endeavoured to point out amidst those of most frequent occurrence, the three which may be selected with profit for the table, and some others which are nearly allied, from which we must be careful to separate them. The three mild-flavoured _Russulæ_ are the _Ag. heterophyllus_, _Ag. ruber_, and _Ag. virescens_; the botanical characters of the first are as follows:— _Ag. heterophyllus._