pite facillime secedentes, acie integerrimae, pileo con- 

 colores V. pallidiores. Stipes fistulosus, teres \ix basi 

 subincrassatulus (15'" loiig, X 2-3'" diam.), laevis, gla- 

 berrimus, fibrosulus, pileo concolor, mycelio albo-ara- 

 neoso V, gossypinnlo kitiusciule expanso radicatus. 

 Sporae albae. 



Hab. In pratis arenosis sub umbra arbuscularum prope 

 Punta, Arenas in Freto magellanico, April 1882. 



Obs. Caro pilei tennis, hygrophana, mollis, lamellis ad- 

 nata ; illa stipitis fibrosa. Sporae liyalinae, globosae 

 (3-3,5 ¡j. diam.) laeves. 



Species Ag. expallenti Pers. valde aílinis. 



5. Agaricus (Ch'íocí/6e) laccatls Scop. — Fr.^Hym. Eurp. 



p. 108, n. 332. 



Hab. Ad terrain herbosam sub umbra Salicis humbold- 

 tianae secus Rio Negro, Mart. 1883. 



Obs. Species valde polymorpha, sine dubio cum illa euro- 

 pea idéntica ; specimina patagónica saepius colore ob- 

 scuriore et pileo margine repando-sublobato gaudent. 



6. Agaricus (Mycena) exqlisitüs Hook. — Fl. Ant., vol. 



II, p. 447. 



Hab. Ad raaios dejectos putrescentes Chiliotrichi amel- 

 loidis prope Punta Arenas, Aug. 1882. 



Obs. Basipes; pusillus, fulvus, puberulus, sparsus; pileus 

 primo subhemisphaericus, margine intus subincurvulus, 

 densiuscule pilosus, dein subcampanulato-expansus, 

 (quandoque irregularis), dense puberulus, margine acu- 

 tiusculus, rectus, integer, fuho-melleus, centro inten- 

 sius coloratus ; lamellae paucae, distantes, 4 v. 6 lon- 

 giores, truncato-adnatae, non decurrentes nec sinuatae, 

 pro ratione crassiusculae, acie integrae, cum minoribus 

 plus minusve evolutis alternae, albae v. dilutissime 

 albo-melleae ; stipes centralis sub pileo abrupte incur- 



