OF THE FOBTY->~INTH PARALLEL OF LATITUDE. 53 



M. laevigata, ScJirad. 



Hab. Kettle Falls, Columbia River, LyalL 



M. PLATYPHYLLOIDEA, NeeS. 



Hab. Fort Colville, LyalL 



Ptilidiitm, JSfees. 

 P. ciliare, Ehrh. 

 Hab. Fort Colville, LyalL 



CHiETOPSis, gen. iioy. 



PeriantMum terminale, obovatum, tubulosum, ore connivente 

 ciliato. JFolia et amphigastria palmatifida. 



C. trichophylla, Linn. 

 Hab, Cascade Mountains, LyalL 



Frullania, Raddi. 

 F. tamarisci, Linn. 



Hab. Vancouver and Orcas Islands, LyalL Collected also on the N.W. 

 coast by Menzies and Douglas. 



The specimens are very slender, and at first sight would scarcely 

 be supposed to belong to the same species as the European forms. 

 The leaves are rounded, in the fertile stems acute, in the male 

 plants with the point innexed, and the coloured cells in some 

 of the leaves are only found after careful search. ]S"o American 

 examples have yet been seen which can compare with British one3 

 in size. 



Metzgeria, Raddi. 



M. pubescens, Schrank. 

 Hab. British Columbia, LyalL 



Sarcomitrium, Corda. 



S. palm at um, Hedw. 

 Hab. Fort Colville, LyalL 



Marchantia, Linn. 



M. polymorpha, Linn. 



Hab. Saskatchewan and Rocky Mountains, Bourgeau. Fort Colville 

 and Sinyakwateen, LyalL 



Fegatella, Raddi. 

 F. conica, Linn. 

 Hab. British Columbia, near Fort Colville, LyalL 



