(414) 
25. HELIOMYCES Lév. Ann. Sci. Nat. Bot. III. 2: 177. 
1844. 
Pileus thin, subgelatinous, reviving: lamellae adnexed, 
adnate or decurrent: spores white or whitish: veil none: 
stipe central, slender, tubular, horny. 
Type, W. elegans Lév. (Syll. 5: 569.) 
A small, poorly known tropical genus, here taken in the 
same sense as in the Sydloge. 
26. MYCETINIS gen. nov. 
Marasmius § Myctnopsis Schroet. Krypt. Fl. Schles. 3': 
558. 1889. 
Pileus thin, membranous, reviving, the margin at first ap- 
pressed not incurved, convex or campanulate: lamellae free, 
adnexed or adnate: spores white: veil none: stipe central, 
rigid, horny, radicating or dilated. 
ype, Marasmius alliaceus (Jacq.) Fries, Epicr. 383. 
1838. (Syll. 5: 534.) 
This includes Marasmius § Mycena, subsection Chor- 
dales, of the Sylloge. 
27. MARASMIUS Fries, Gen. Hymen. 9. 1836. 
Pileus thin, membranous, reviving, the margin at first ap- 
pressed not incurved, plane or umbilicate: lamellae free, ad- 
nexed or adnate, often joined in a collar: spores white: veil 
none: stipe central, filiform, flaccid, inserted. 
Type, MZ. androsaceus (L.) Fries. (Syll. 5: 543.) 
As here defined this includes only the subsection Aosulae, 
of the Syl/oge. It is probable that a careful study of the 
many species included under the old genus Marasmius would 
result in even further segregation. 
28. CRINIPELLIS Pat. Jour. Bot. 3: 336. 1889. 
Pileus thin, reviving, margin incurved, pellicle of thread- 
like hairs: lamellae adnate or adnexed: spores white: veil 
none: stipe central, slender, tubular. 
Type, Collybia stipitaria Fries. (Syll. 5: 216.) 
The limits of this genus are not well known. In his Essa? 
