TWO NEW SPECIES OF MUSCI; WITH FIGURES: By JOHN LEWIS RUSSELL. 

 PotYTRlCIIUM. 



(Section I. Hooker.) Calyptra naked. CATHARINEA. Ehrh. 



POLYTRICHUM *INCURVATUM I Nobis. 



P. foliis lanceolatis suberectis, marginibus planis, apicibus 

 serratis : nervo valido multipticato undulato : theca cylindracea 

 cerniuscula. 



Obs. Forsan Polytriehum Lcevigatwn. Wahlenberg. 



Description. Stems short, leaves rather delicate, remarkably 

 hygrometric, curling inward at the tips or apices, which are of a 

 reddish-brown color. Entire plant, scarcely an inch in height. 

 Perhaps it is Wahlenberg's P. lasvigatum, which it resembles in 

 having the calyptra " perfectly smooth.'* 



Entire plant: and leaf magnified. 



Habitat. On old decayed logs ; Chelmsford, Middlesex 

 County, Massachusetts. 



Discovered while in search of specimens of mosses, April, 

 1839. 



(Section 2. Hooker.) Calyptra covered with filaments. 



POLYTRICHUM *BoREALE. Nobis. 



P. foliis lanceolatis acuminatis ; marginibus planis ; nervo 

 totali validissimo : caulibus brevissimis : pedunculo terminali 

 semiunciali : theca cylindracea recta, operculo conico, centro 

 breviter apiculato recurvato. 



