Part 4, 1915] AGARICACEAE 257 
the center, margin entire, concolorous: lamellae about 12 in number, rather broad, adnate, 
somewhat arcuate, subconcolorous: stipe fuliginous to blackish, capillary, smooth, glabrous, 
polished, inserted, 2-3 cm. or more long. 
Type collected on dead leaves and fallen sticks in woods near San Juan, Porto Rico, November, 
1912, Brother Hioram (herb. N. Y. Bot. Gard.). 
DisTRIBUTION: Porto Rico. 
15. Marasmius stylobates Berk. & Curt. Jour. Linn. Soc. 10: 296. 
1868. 
Pileus thin, convex to plane, 4 mm. broad; surface white, glabrous, margin inflexed, 
sulcate: lamellae white, free, broad, distant: stipe white, glabrous, hollow, base orbicular, 
12 mm. long. 
Type LOCALITY: Cuba. 
Hasirat: On rotten wood. 
DISTRIBUTION: Known only from the type locality. 
16. Marasmius praedecurrens Murrill, sp. nov. 
Pure-white throughout; pileus convex to nearly plane, umbonate when young, usually 
becoming depressed about the umbo with age, gregarious, 3-4 mm. broad; surface smooth, 
striate to pruinose, especially at the center, becoming more or less glabrous with age, margin 
very thin, entire: lamellae long-decurrent, of medium breadth, not crowded, not interveined: 
stipe filiform, smooth, glabrous, slightly enlarged at the apex, whitish-mycelioid at the base, 
slightly pruinose and usually much twisted on drying, 1.5-2 em. long. 
Type collected on moist ground among mosses and sticks in Bermuda, November 29-December 
14, 1912, Brown, Brition, & Seaver 1383 (herb. N. Y. Bot. Gard.). 
DistRIBUTION: Known only from the type locality. 
‘17. Marasmius niveicolor Murrill, sp. nov. 
Pileus conic to broadly convex with a subconic umbo, small and thin, pellucid, cespitose, 
5-7 mm. broad; surface snow-white, smooth, glabrous, striate, finely pruinose under a lens, 
margin entire, concolorous: lamellae decurrent, broad, distant, inserted, white: spores ovoid, 
smooth, hyaline, granular, 7-8 X 3-4 uw: stipe very long and capillary, white, smooth, glabrous, 
4m. long. 
Type collected on fallen dead wood at Motzoradngo, near Cordoba, Mexico, January 15, 1910, 
W. A. & Edna L. Murrill (herb. N. Y. Bot. Gard.). 
DistrisuTion: Known only from the type locality. 
18. Marasmius setulosipes Murrill, sp. nov. 
Pileus convex to plane, small, thin, solitary, scarcely reaching 5 mm. broad; surface milk- 
white, unicolorous, glabrous, not striate, margin entire, concolorous: lamellae adnate, crowded, 
of medium breadth, not interveined, white: stipe slender, slightly tapering upward, grayish, 
not twisted on drying, densely covered with very minute, short, irregular, pointed hairs, which 
do not disappear with age, 1.5-2 cm. long, 1 mm. thick below, 0.5 mm. thick at the apex. 
Type collected on dead fallen leaves and sticks at Lake Cunningham, New Providence, Bahama 
Islands, September 8, 1904, Elizabeth G. Britton 651 (herb. N. Y. Bot. Gard.). 
DIstRIBUTION: Known only from the type locality. 
19. Marasmius synodicus (Kunze) Fries, Epicr. Myc. 381. 1838. 
Agaricus (Collybia) synodicus Kunze; Fries, Linnaea 5: 507. 1830. 
Marasmius dealbatus Berk. & Curt. Jour. Linn. Soc. 10: 296. 1868. 
Marasmius catervatus Massee, Jour. Bot. 30: 161. 1892. 
Moarasmius cerussatus Pat.; Duss, Enum. Champ. Guad. 46. 1903. 
Pileus convex to expanded, varying from slightly umbonate to slightly depressed, gre- 
garious, 6-10 mm. broad; surface white or pallid, subpruinose to subglabrous, usually striate 
or sulcate, at least when dry, margin entire, concolorous: lamellae adnate, distant, inserted, 
forking, usually interveined, white or pallid: spores ellipsoid, smooth, hyaline, 64 yu: stipe 
