PLATE XVI. 



Figs. I, a-i. Barbula saundersii. 



i, a. Entire plant, natural size. 



i, b. Leaf (X 26). 



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



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



1, e. Perichaetial leaf ( X 2 &)- 



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



1, g. Cells in the middle of the same ( X 2 7°)- 



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



1, i. Capsule and peristome (X I 3) < 

 2 , a-n. Orthotrichum fenestratum. 



2, «. Entire plant, natural size. 

 2. b, b, b. Leaves ( X J 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 I 35)« 



2, g. Areolation of the apex ( X ^ZS)* 



2, h. Capsule and lid ( X *3)« 



2,z\ Calyptra (Xi3)- 



2,y. Capsule, deoperculate, in moist state ( X I 3 y « 



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



2, /. A stomate ( X J 35)- 



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



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



(354) 



