ulmarius (Pleurotus), 102. umbellatus (Polyporus), 189. unicolor (Pholiota), 151. vaginata (Amanitopsis), 74. variicolor (Bolbitius), 164. velutinum (Hydnum), 200. velatipes (Amanita), 63. velutipes (Collybia), 92. velutipes (Spathularia), 220. vermiculosus (Boletus), 177. verna (Amanita), 60. vernalis (Naucoria), 154. verrucosum (Scleroderma), 212. versicolor (Polystictus), 192. versutus (Crepidotus), 160. violacens (Cortinarius), 161. virescens (Russula), 126. virosa (Amanita), 61. volemus (Lactarius), 115. volvata (Amanitopsis), 76. vulgare (Scleroderma), 212. vulgaris (Mycena), 97. vulpinus (Lentinus), 134. * * * * * * Transcriber's Notes: Page 17 [A] For analytical keys to the families and genera see Chapter XXII. Changed Chapter XXII to XXIV. Apparently Chapters were added making these references outdated. Page 18 [B] For analytical key to the genera see Chapter XXII. Changed Chapter XXII to XXIV. Page 32 The spores are black in mass, not purple tinged. For analytical keys to the genera see Chapter XXII. Changed XXII to XXIV. Page 33 Changed kornos to kopros in accordance with printed correction list. Page 52 The spores are white in mass, or sometimes with a faint yellowish or lilac tinge. For analytical keys to the genera see Chapter XXII. Changed XXII to XXIV. Page 54 Figures 52--54 are from plants (No. 2065 C. U. herbarium) collected in an open woods near Ithaca. For the poisonous property of the plant see Chapter XX. Changed Chapter XX to Chapter XXII. Page 58 condition of the circumsissle Changed to circumscissile. Page 60 as _A. verna_; the pilus convex, the annulus broad and entire, Changed to pileus. Page 69 a few remnants of the volva, striate on the margin, and 1-.5 cm. Unchanged, although 1-1.5 cm. may have been intended. Page 71 Facing Plate 19 Fig. 2.--A. cæsaria. Changed to cæsarea. Page 104 often in a recticulate fashion. The =spores= are white, oblong, 7--10 µ Changed to 'reticulate'. Page 132 variations being due to numbers of colored cystida Changed to cystidia. Page 138 The spores are rosy, pink, salmon colored, flesh colored, or reddish. For analytical keys to the genera see Chapter XXII. Changed Chapter XXII to XXIV. Page 148 The =pileus= is convex and umbilcate, somewhat membranaceous, smooth, Changed to umbilicate. Page 150 The spores are ochre yellow, rusty, rusty-brown, or some shade of yellow. For analytical keys to the genera see Chapter XXII. Changed XXII to XXIV. Page 155 membraneous, ovate or companulate Changed to campanulate. Page 164 during May and June, 1898, in a freshly manured grass plat between plat = a portion of flat, even ground. Page 182 were found in open woods under Kalmia were the sun had an opportunity Changed to 'where the sun'. Page 209 giant buff-ball, and the _L. cyathiforme_, where the wall or peridium Changed to 'puff-ball'.