PLATE XL. 

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



FIGS, i, a-d. Hypnum pseudostramineum. 



i, a, a. Leaves ( X !) 



i, b. Lower part of the costa ( X I 3) 



i, c. Areolation in the middle of a leaf ( X 22 5) 



1, d. Areolation of the apex of a leaf ( X 22 5) 



2, a-h. Hypnum plcsiostramineum. 

 2, a. Entire plant, natural size. 

 2, b, b. Lower leaves ( X I 8). 



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



2, d. Upper leaf ( X 18). 



2, e. Branch leaf ( XiS). 



2,f. Auricle and basal areolation of a leaf ( X 22 5) 



2,g. Cells in the middle ( X 22 5)- 



2, /i. Areolation of the apex ( X 22 5)- 



3, a-e. Meesea tscJiuctschica. 



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 I 3S)- 



3, e. Areolation of the apex ( X *35)- 



4, a-c. Brachythecium reflexum pacificum. 



4, a. Stem-leaf (X 13)- 



4, b. Basal areolation ( X 135)- 



4, c. Marginal areolation in the middle ( X I3S)- 



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