(425 ) 
Type, Z. anatina (Lasch) Quél. (Syll. 5: 707.) 
Used as in the Sylloge. 
61. LEPTOMYCES Mont. Syll. Crypt. 128. 1854. 
ffiatula (Fries) Sacc. Syll. 5: 305 (metonym). 1887. 
Type, H. Bengonz (Fries) Sacc. (Syll. 5: 305.) 
Leucoprinus Pat. Bull. Soc. Myc. Fr. 4: 26 (metonym). . 
1888. Type, Hiatula flaviceps (Pat.) Sacc. (Syll. g: 40.) 
Putrescent: pileus membranous, plicate-sulcate, the margin 
splitting on the back of the lamellae, appressed to stipe when 
young: lamellae free or attached: spores white: veil none: 
stipe central, slender, tubular, cortex cartilaginous. 
Type, Hiatula lignifragus Mont. (Syll. 5: 307-) 
This takes the place of Avzatula of the Sylloge. The 
character of the pileus is the same as in Copfrinopszs and 
Galerella. 
62. DELICATULA Fayod, Ann. Sci. Nat. Bot. VII. 9g: 
313. 1889. 
Putrescent: pileus umbilicate, the margin at first ap- 
pressed: lamellae decurrent, thick, obtuse, narrow: spores 
white: veil none: stipe central, slender, tubular, cortex 
cartilaginous. 
Type, Omphalia integrella (Pers.). (Syll. 5: 337.) 
This is Onphalia subsection Jutegrellae, of the Sylloge. 
63. OMPHALOPSIS gen. nov. 
Omphalia (Fries) Quél. 1872. Not Omphalius Roussel. 
1806. Type, O. cyanophylla Fries. (Syll. 5: 329.) 
Putrescent: pileus usually umbilicate, the margin at first 
appressed: lamellae decurrent, thin, broad, acute: spores 
white: veil none: stipe central, slender, tubular, cortex car- 
tilaginous. 
Type, Agaricus campanella Fries, Syst. Myc. 1: 166. 
1821. (Syll. 5: 327, as Omphalia Campanella.) 
This is Omphailra subsection Campanellae, of the Sylloge. 
64. INSITICIA gen. nov. 
Putrescent: pileus convex, the margin at first appressed : 
lamellae adnate or adnexed: spores white: veil none: stipe 
