PLATE XIX. 



Figs, i, a-f. Bryum ateleostomum. 



I, a. Entire plant, natural size. 



i, b, b. Leaves ( X I 3)« 



i, c. Apex of a leaf ( X 60). 



1, d. Basal areolationof the same ( X I 35)« 



1, e. Marginal areolation, in the middle ( X x 35)« 

 i,f. Capsule ripe, in dry state ( X l Z)- 



2, a-g. Bryum heterogynum. 



2, a. Female plant, natural size. 



2, b. Male plant, natural size. 



2, c. Leaf of the female plant ( X I 3)« 



2, d. Apex of the same ( X 60) • 



2, e. Basal areolation ( X i-ZS)- 



2,f. Cells in the middle ( X 135)* 



2, g. Young capsule in dry state ( X l 3)' 



3, a-g. Bryum laurentianum. 



3, a. Entire plant, natural size. 



3, &, b. Stem-leaves ( X26). 



3, b'. Branch-leaf ( X 26). 



3, c. Transverse section of a leaf ( X 60). 



3, d. Transverse section of the costa ( X 2 7°)- 



3, e. Basal areolation ( X I 35)- 



3,y. Marginal areolation in the middle ( X : 35)- 



3, g. Areolation of the apex ( X J 35)- 



(360) 



