PLATE XXXIII. 

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



FlGS. I, -**. Barbula saundersii. 



I, . Entire plant, natural size. 



i,*. Leaf (X 26). 



i, c. Apex of the same ( X 60) 



I, d. Part of a transverse section of the same ( X 100). 



I, e. Perichsetial leaf ( X 26). 



i,f. Basal areolation of a stem-leaf ( X 1 35)' 



I, g. Cells in the middle of the same ( X 2 7) 



I, h. Capsule and lid ( X *3)- 



1, *". Capsule and peristome ( X 1 3)> 



2, a-n. Orthotrichum fenestratum. 

 2, a. Entire plant, natural size. 

 2, b, b, b. Leaves ( X T 3)- 



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



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



2, e. Basal areolation of a leaf ( X 1 35)- 



2,f. Areolation in the middle ( X J 35)- 



2, g. Areolation of the apex ( X 1 35)* 



2, h. Capsule and lid ( X I 3) 



2,1. Calyptra(Xi3)- 



2,y. Capsule, deoperculate, in moist state ( X J 3) 



2, k. The same split lengthwise ( X I 3)- 



2, I. A stomate ( X J35)' 



2, m. A tooth of the peristome ( X I 35)- 



2, . Upper part of the same ( X 2 7)- 

 [354] (3H) 



