PLATE XX. 



i, a-g. Bryum treleasei. 



I, a. Entire plant, natural size. 



i, b, b. Leaves ( X *3)- 



1, c, c. Transverse section of a leaf ( X 135)- 



I, d. Basal areolation of the same (IX I 35)- 



1, e. Marginal areolation in the lower part ( X I 3. l >)' 



i,f. Areolation of the apex ( X 135)- 



1, g. Young capsule, in moist state ( X J 3)- 



2, a-k. Bryum agattuense. 



1, a. Entire plant, natural size. 



1, b y b. Stem-leaves ( X I 3)« 



2, c. Branch-leaf ( X l 3)- 



2, d. Basal areolation ( X J 35)- 



2, e. Areolation in the middle ( X !35)- 



2,_/". Areolation of the apex ( X I 35)« 



2, g. Capsule unripe, in dry state ( X x 3)- 



2, h. Capsule ripe, in moist state ( X I 3)« v 



(3 62 ) 



