Parr 5, 1916]: AGARICACEAE 349 
20. Omphalina cuspidatella Murrill, sp. nov. 
Pileus convex to plane, with an abrupt, small, conic, pointed umbo, cespitose, reaching 
_ lem. broad; surface white, with a faint rosy tint, slightly silky, smooth, margin thin, entire, 
, white: lamellae decurrent, arcuate, distant, white with a slightly yellowish tint: stipe slightly 
dilated above and tapering below, smooth, white, glabrous, 1.5 em. long, 2 mm. thick. 
Type collected on the ground in rich moist soil under tree ferns at Morce’s Gap, Jamaica, 
December 29-January 2, 1908-9, W. A. & Edna L. Murrill 727 (herb. N. Y. Bot. Gard.). 
DistRiBuTION: Known only from the type locality. 
21. Omphalina acuminata Murrill, sp. nov. 
Pileus conic, with a very long, pointed umbo, gregarious to subcespitose, scarcely reaching 
1 cm. broad; surface slightly viscid when moist, pruinose to glabrous, white, margin entire, 
concolorous, incurved when young: lamellae distant, broad, plane, short-decurrent, white: 
spores ovoid or ellipsoid, smooth, hyaline, 8-9 X 64: stipe slender, whitish, pulverulent to 
glabrous, slightly enlarged at the base, 1 cm. long, scarcely 1 mm. thick. 
Type collected on much decayed wood by a roadside in woods at Union Hill, 600 m. elevation, 
near Moneague, Jamaica, January 17, 18, 1909, W. A. Murrill 1178 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Vicinity of Moneague, Jamaica. 
22, Omphalina collybiiformis Murrill, sp. nov. 
Pileus convex to umbilicate, rather tough, gregarious, 3 cm. broad; surface whitish with a 
satiny luster,-glabrous, becoming striate from the cracking of the cuticle, margin concolorous, 
becoming reflexed and splitting with age: lamellae decurrent, distant, narrow, whitish: spores 
subglobose, smooth, hyaline, 4-7 u: stipe cylindric, equal, tough, smooth, glabrous, whitish, 
hollow, 2-5 cm. long, 2-3 mm. thick. 
Type collected on decayed wood in a moist virgin forest in the Tepeite Valley, near Cuernavaca, 
Mexico, 2100 m. elevation, December 28, 1909, W. A. & Edna L. Murrilj 477 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
23. Omphalina jalapensis Murrill, sp. nov. 
Pileus deeply infundibuliform, gregarious, reaching 3.5 cm. broad and 2 em. high; surface 
whitish, hygrophanous, smooth, glabrous, the margin lobed and irregular, not striate, incurved 
when young: context thin, white, flexible, inclined to be tough, fragile when dry; lamellae 
short-decurrent, determinate, crowded, narrow, rather thick, white, several times inserted 
and some of them forked: spores ovoid, smooth, hyaline, 5 X 3.5 4: stipe somewhat com- 
pressed, dilated above, smooth, concolorous, pubescent at the base, hollow, 2 cm. long, 3-5 mm. 
thick. 
Type collected on the ground in humus in a moist virgin forest near Jalapa, Mexico, December 
12-20, 1909, W. A. & Edna L. Murrill 165 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
24. Omphalina lenta Murrill, sp. nov. 
Pileus rather tough, infundibuliform, gregarious, reaching 1 cm. broad; surface smooth, 
furfuraceous, pale-tan, margin incturved when young, concolorous: lamellae decurrent, narrow, 
rather thick, distant, yellowish: stipe cylindric, equal, very slender, pallid to subconcolorous, 
furfuraceous to glabrous, 2-3 cm. long, 1-1.5 mm. thick. 
Type collected on a fallen dead stick at Hall’s Delight, Jamaica, 500 m. elevation, October 25, 
1902, F. S. Earle 122 (herb. N. Y. Bot. Gard.). . 
DISTRIBUTION: Known only from the type locality. 
25. Omphalina flavella (Berk. & Curt.) Murrill. 
Agaricus (Omphalia) flavellus Berk. & Curt. Jour. Linn. Soc. 10: 286. 1868. 
Omphalia flavella Sacc. Syll. Fung. 5: 334. 1887. 
Pileus thin, umbilicate to infundibuliform, gregarious, 1~1.5 em. broad; surface glabrous, 
flavovirens when young, melleous when old, margin striate, incurved: lamellae decurrent, few, 
distant, arcuate, melleous: spores globose, smooth, hyaline, 4-7 u: stipe slender, appressed, 
