FIG. 108. Longitudinal section of moss capsule 

 (Funaria), showing its complex character: 

 d, operculum; p, peristome: c, c', columel- 

 la; $, sporogenous tissue; outside of s the 

 complex wall consisting of layers of cells 

 and large open spaces (h) traversed by 

 strands of tissue. After GOEBEL. 



A 



B 



FIG. 110. Sporogonia of Grimmia, from all of 

 which the operculum has fallen, displaying 

 the peristome teeth : A, position of the teeth 

 when dry ; B, position when moist. After 

 KEENER. 



sin 



FIG. 109. Partial longitudinal 

 section through a moss cap- 

 sule : A, younger capsule, 

 showing wall cells (a), cells 

 of columella (i\ and sporog- 

 enous cells (su) ; B, some- 

 what older capsule, a and i 

 same as before, and sm the 

 spore mother cells. After 

 GOEBEL. 



