PLATE XIX. 



Figs, i, a-f. Brytitn ateleostomum. 



I, a. Entire plant, natural size. 



I, b, b. Leaves ( X 13)- 



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



I, d. Basal areolation of the same ( X 135)- 



1, e. Marginal areolation, in the middle ( X I35)- 

 !,_/". Capsule ripe, in dry state ( X 13)- 



2, a-g. Bryum hcterogynum. 



2, a. Female plant, natural size. 



2, b. Male plant, natural size. 



2, c. Leaf of the female plant ( X 13)- 



2, d. Apex of the same ( X 60). 



2, e. Basal areolation ( X I35)- 



2,_/". Cells in the middle ( X 135)- 



2, g. Young capsule in drj state (X 13 )• 



3, a-g- Bryuin laurentiatium. 



3, a. Entire plant, natural size. 



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



3, *^ Branch-leaf ( X 26). 



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



3, d. Transverse section of the costa ( X 270). 



3, e. Basal areolation ( X I35)' 



3,_/. Marginal areolation in the middle ( X 135)' 



3, g. Areolation of the apex ( X i35)- 



(360) 



