206 CLAVIS AGAKICINOKUM. 



Mycena corresponds with Nolanen, Plate II. fig. 17 ; Galera, 

 Plate III. fig. 24 ; Psathjra, Plate IV. fig. 31 ; and Tmthjrella, 

 Plate V. fig. 34. The species figured is Agaricus (Mycena) poly- 

 grammus,^\\}\. Spores •00035" X •00036". Two forms of a young 

 A. (Mycena) epipterygitis. Scop., are given on the plate, to show the 

 margin of pileus adpressed to the stem. 



Fries, in his ' Monograpiiia Hymenomycetum,' alters the sequence 

 of Mycena and Omphalia as given in his 'Epicrisis,' and places Om- 

 phalia first. The arrangement of the ' Epicrisis ' seems to me more 

 natural, as Mycena is certainly intermediate between Collybia and Om- 

 phalia, the gills being adnate in the former and decurrent in the latter. 



Subgenus 9. Omphalia, Fr. Epicr. p. 110 (Plate I. fig. 9).— 

 Pileus generally from the first umbilicate, afterwards funnel-shaped, 

 almost always membranaceous or submerabranaceous and hygropha- 

 nous, margin incurved or straight ; stem cartilaginous and tubular, 

 when young often stutfed, confluent with the hymenophorum, but hete- 

 rogeneous from it ; gills generally truly and considerably decurrent. — 

 Hab. Generally epiphytal, and mostly peculiar to hilly regions, prefer- 

 ring a damp, woody situation, and a rainy climate. 



Omphalia corresponds with Eccilia, Plate II. fig. 18 ; Tnharia, 

 Plate III. fig. 35 ; and Deconica, Plate IV. fig. 33. The species, 

 though small, are many of them beautiful ; their properties are not 

 known, and they endure changes of temperature like the hygropha- 

 nous species of Clitocybe. Omphalia is naturally divided into two 

 groups, one, Cullyharice, approaching Gollybia in the involute margin 

 of the pileus, but differing in the deeply decurrent gills and umbilicus, 

 and the other, Mycenaria, pointing to Mycena in the straight margin 

 of the pileus, at first adpressed to the stem, but differing in the nature 

 of the gills and pileus. The species included in the last three sub- 

 genera might more conveniently be classed in four, thus: — Margin 

 of pileus at first incurved, gills adnate, — Collybia ; margin of pileus 

 at first incurved, gills decurrent, — Omphalia (CoUyhan(e) ; margin of 

 pileus at first straight, gills adnate or sinuate, — Mycena; margin of 

 pileus at first straight, gills decurrent, — Omphalia (Mycenarire) . Under 

 this arrangement various analogous species amongst the Hyporhodii, 

 Dermini, and Pratellfe, now so unsatisfactorily placed in such subgenera 

 as Naucoria, etc., would fall naturally into proper positions. The 

 species figured is A. (Omphalia) fibula. Bull. Spores -00013" X -0008". 



