PLATE XXXV. 



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



Bryum drepanocarpum. 



Entire plant, natural size. 



Leaves ( X 13)- 



Transverse section of a leaf ( X^o). 



Part of the same ( X i35)' 



Marginal areolation in the middle of a leaf ( X ISS)* 



Areolation of the apex ( X i35)' 



Young capsule ( X 13)- 



Capsule ripe, in dry state ( X 13)* 



Bryum cylindrico-arcuatum. 



Entire plant, natural size. 



Leaves ( X 13)- 



Transverse section of a leaf ( X 60). 



Basal areolation ( X I35)' 



Cells in the middle of a leaf ( X I35)« 



Areolation of the apex ( X I35)' 



Capsule in dry state ( X "^Z)' 



Bryum leptodictyon. 



Entire plant, natural size. 



Leaves ( X 13)- 



Basal areolation ( X i35)- 



Cells in the middle of a leaf ( X I35)» 



Areolation of the apex ( X i3S)' 



Capsule in moist state ( X 13)* 



Bryum. pseudo-sttrtoni. 



Entire plant, natural size. 



Stem-leaf (X 13). 



Branch-leaves ( X 13)- 



Basal areolation ( X 135) • 



Cells in the middle of a leaf ( X i35)« 



Capsule ripe, in moist state ( X 13)- 



Capsule in dry state ( X ^3)' 



(318) 



