Nebraska, _Clements_; West Virginia; Eagle’s Mere and Mt. Gretna, Pa. In hemlock and mixed woods. Autumn. _McIlvaine._ =Cap= 2–4 in. across. =Stem= 3–4 in. long, up to ¾ in. thick. Every part of the plant turns red and has a congested appearance when bruised. The flesh is white but immediately becomes red when broken. It is a frequent but not common species, growing singly, or in small clusters. In flavor and substance it is equal to any mushroom. =A. mari´timus= Pk. =Pileus= very fleshy, firm, at first subglobose, then broadly convex or nearly plane, glabrous, sometimes slightly squamose with appressed spot-like scales, white becoming dingy or grayish-brown when old. =Flesh= whitish, quickly reddening when cut, taste agreeable, odor distinct, suggestive of the odors of the seashore. =Lamellæ= narrow, close, free, pinkish becoming purplish-brown with age, the edge white. =Stem= short, stout, firm, solid, equal, sometimes bulbous, white, the annulus delicate, slight and easily obliterated. =Spores= broadly elliptic, purplish-brown, 7–8µ long, 5–6µ broad. =Pileus= 2–8 in. broad. =Stem= 1–2 in. long, .6 in. thick. Sandy soil near salt water, Lynn, Mahant and Marblehead, Mass. June to December. _R.F. Dearborn._ This is a very interesting and an excellent mushroom. Dr. Dearborn writes that he has used it on the table for fourteen years and that it is the only mushroom that he has ever eaten in which the stem is as good as the cap. He considers it the most hearty and satisfying of all the numerous species that he has ever eaten. Both its taste and odor is suggestive of the sea. The latter is quite strong, and perceptible by one riding along the road by whose side the mushrooms are growing. They sometimes grow in semicircles and attain a larger size in warm weather than in the colder weather of autumn. They are most abundant in August. The flesh, when cut or broken, quickly assumes a pink or reddish hue on the freshly-exposed surface. This is a very distinctive character and with the maritime habitat makes the species easy to recognize. Another species, Agaricus hæmorrhoidarius Kalchb. exhibits a similar change of color in its wounded flesh, but is of very rare occurrence with us, does not, so far as ascertained, grow near the sea, has a darker cap and a long hollow stem. The stem in the maritime mushroom is short and solid. Its collar is very slight and easily destroyed. _Peck_, Bull. Torr. Bot. Club, Vol. 26, No. 2, F. 1899. =A. Califor´nicus= Pk.—=Pileus= at first subconical, becoming convex, minutely silky or fibrillose, whitish, tinged with purple or brownish-purple on the disk. =Flesh= whitish. =Gills= close, free, pink becoming purplish, then blackish-brown. =Stem= rather long, solid or stuffed, equal or tapering upward, distinctly and rather abruptly narrowed above the entire externally silky ring, pallid or brownish. =Spores= broadly elliptical, 5–6×4–5µ. =Pileus= 1–3 in. broad. =Stem= 1.5–3 in. long, 2–4 lines thick.