FUNAB1A. 



339 



sac is, so to speak, perforated by the columella, the latter 

 passes into a bundle of green cell-rows resembling the 

 trabeculae and joined on to the inner apophysis tissue. 



..OPERCULUM 

 EXOSTOME 



ENDOSTOME 



ANNULUS 



Fig. 82. FUNARIA. A portion of Fig. 81, enlarged to show details of the tissues 

 in the region of the Annulus. 



Now examine carefully the upper part of the capsule, 

 and note 



(h) the operculum, consisting of an outer layer" (epi- 

 dermis) of cells with thickened outer walls, and three 

 layers of small thin-walled cells ; 



(i) the peristome, appearing as a curved layer of cells 

 with the vertical and outer walls strongly thickened. Trace 



