FIGS. 



PLATE XXXIII. 

 [Proc. Wash. Acad. Sci., Yol. IV, PL XVI.] 



a-i. Barbula saundersti. 



a. Entire plant, natural size. 



b. Leaf (X 26). 



c. Apex of the same ( X 60) 



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



e. Perichsetial leaf ( X 26). 



,/. Basal areolation of a stem-leaf ( X 135)- 



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



, h. Capsule and lid ( X 13)- 



*. Capsule and peristome ( X I 3) 



2, a n. OrthotricJtum fenestratum. 



2, a. Entire plant, natural size. 



2, &, b, b. Leaves ( X^)- 



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 *35)' 



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



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



2, h. Capsule and lid ( X 13) 



2, i. Calyptra(Xi3)- 



2,y. Capsule, deoperculate, in moist state ( X JS)* 



2, k. The same split lengthwise ( X 13)- 



2, /. A stomate ( X 135)- 



2, m. A tooth of the peristome ( X J 35)' 



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

 [354] (3H) 



