114 PROCEEDINGS OF THE AMERICAN ACADEMY 



On decayed wood, Bonin Islands. — Closely allied to the last, but 

 differing in its free gills, &c. 



21. A. (Mycena) pittrodes, Berk. & Curt. : albus, tenerrimus ; 

 pilco campanulato furfuraceo ; stipite gracili flocculento e basi orbicu- 

 lari estriata oriundo. 



On decayed wood, Bonin Islands. — Allied to A. tenerrimus, Berk. 



22. A. (Omphalia) tjsta. Berk. & Curt. : rufus ; pileo tenui in- 

 fundibuliformi glabro ; stipite recto sursum incrassato basi orbiculari 

 strigosa affixo ; lamellis angustis decurrentibus. 



On dead twigs, Bonin Islands. — Somewhat resemhling A. pyxidatus. 



23. A. (Omphalia) ruficeps, Berk. & Curt. : rufus ; pileo de- 

 presso membranaceo ; stipite glabro ; lamellis angustis distantibus 

 decurrentibus venoso-connexis. 



On dead wood, Bonin Islands. 



24. A. (Omphalia) Ephippicm, Berk. & Curt. : purpureo-fuscus ; 

 pileo umbilicato subsquamuloso ; stipite sursum dilatato nigro-punctato ; 

 lamellis ci'assiusculis decurrentibus. 



On the ground, Bonin Islands. — Allied to A. ^imbelliferus. The 

 helvelloid form of the pileus when dry is peculiar. 



25. A. (Omphalia) OusuiiE, Berk. & Curt, : pileo pallide fusco 

 striate depresso glutinoso ; stipite gracili ; lamellis distantibus decur- 

 rentibus tenuibus albis. 



In the crevices of bark of trees, Ousima, north of the Loo Choo 

 Islands. — Allied to A. iimheUiferus and stellatus, but distinguished 

 from the former by its thin gills and gelatinous pileus ; and from 

 A. stellatus by the latter character and by the base not being stellate. 



2G. A. (Omphalia) Behringensis, Berk. & Curt.: pileo deiiresso 

 cupulajformi glabro striato luteo-albo ; stipite sursum incrassato ; la- 

 mellis adnato-decurrentibus latiusculis distantibus albis. 



Arakamtchetchene Island, Behring's Straits. — Approaches Cantha- 

 rellus Behringensis, but the gills are not forked, &c. 



27. A. (Omphalia) porpiiyromiges. Berk. & Curt. : pallide pur- 

 pureus ; pileo umbilicato tenui ; stipite sursum incrassato basi discoidea 

 aifixo ; lamellis distantibus angustis decurrentibus. 



On decayed wood, Bonin Islands. 



28. A. (Omphalia) plumbarius, Berk. & Curt.: piloo convexo 

 centro depresso griseo-plumbeo ; stipite recto basi tioccis brevibus 

 affixo ; lamellis distantibus decurrentibus. 



