PLATE XL. 

 [Proc. Wash. Acad. Sci., Vol. IV, PI. XXUI.] . 



Figs, i, a-d. Hypnmn fseudostramineum. 



1, a, a. Leaves ( X i8). 



1, d. Lower part of thecosta ( X 130)' 



I, c. Areolation in the middle of a leaf ( X225). 



1, d. Areolation of the apex of a leaf ( X225). 



2, a-A. Hypnum plesiostramineum. 

 2, a. Entire plant, natural size. 

 2, 3, b. Lower leaves ( X iS)- 



2, c. Lower part of the costa ( X 130)' 



2, d. Upper leaf ( X i8)- 



2, e. Branch leaf ( X 18). 



2,y. Auricle and basal areolation of a leaf ( X 225). 



2,g. Cells in the middle ( X 225). 



2, h. Areolation of the apex ( X225). 



3, a-e. Meesea tschuctschica. 



3, a. Entire plant, natural size. 



3, b. Part of a stem ( X3)- 



3, c, c. Leaves (X 13)- 



3, d. Marginal areolation in the middle ( X ISS)* 



3, e. Areolation of the apex ( X I35)' 



4, a-c. Brachythecium reflexum pacificum. 

 4, a. Stem-leaf ( X i3)- 



4, b. Basal areolation ( X I35)' 



4, c. Marginal areolation in the middle ( X I35)' 

 [368] (328) 



