Changed "disc" to "disk" on page 9 of part 4: "the disk is stellate."
Changed "Phalloideae" to "Phalloideæ" in the caption to Plate H.
Changed "Lycoperadaceæ" to "Lycoperdaceæ" on page 12 of part 4: "III.—Lycoperdaceæ."
Italicized "Lepiota" on page 13 of part 4, for consistency: "Subgenus Lepiota Fries."
Changed "cepaestipes" to "cepæstipes" in the caption to Plate XI½: "Agaricus (Lepiota) cepæstipes."
Changed "coerulescems" to "cærulescens" in the caption to Plate XII.
Removed italics from "Scop." on page 23 of part 4: "Clitocybe laccata Scop."
Changed "satanus" to "Satanus" on page 24 of part 4: "Boletus Satanus Lenz."
Changed "Beef-steak" to "Beefsteak" on page 24 of part 4: "Beefsteak Fungus."
One of the plates was labeled with script letter I, to differentiate it from Roman numeral I. I changed script letter I to upper case letter J.