. Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
and on the Sexes of Mosses. . 483 
11. The seta of the two préceding figures, dissected out, to show tlie ori- 
ginal cell still tipping the conical extremity. 
12. An anther of Orthotrichum anomalum, with a jointed filament arising 
from its base. 
13. The conical extremity of the seta of Dicranum flecuosum dissected 
from the vaginula. When confined by the vaginula the extremity 
is closely pressed to the seta. 
14. A bud of Funaria hygrometrica, containing three “ pistilla" in various 
stages of maturity, and surrounded by jointed filaments, or “ fila 
succulenta” of Hedwig. a. A pistillum just protruding from the 
apex of the stem. 6. A pistillum more advanced, with its cell. 
c. A pistillum still more advanced. 
15. A more advanced pistillum from the same plant. a. The apex of the 
stem. 6: The base of the pistillum much elongated by the growth 
of the seta within, and slightly enlarged at the base. c. The style 
hardened. This and the two following figures are not nearly so 
much magnified as the first. 
16. The same, still more advanced. 
17. The same, just after the separation of the pistillum to form the caly- 
ptra. a. The apex of the stem. 6. The vaginula formed by the 
base of the pistillum. c. The sheath of elastic gummy secretion 
exposed by the separation of the calyptra. "This sheath is internal 
to the calyptra, and serves to fix the seta in the vaginula. d. The 
seta. e. The calyptra just separated. f. The hardened style. 
In these last figures the conical extremity of the seta is shown gradu- 
ally forcing its way downwards. 
18. A section of the theca of Gymnostomum pyriforme, a little before ar- 
rived at maturity. a. The seta. b. The theca lined by the thecal 
membrane. c. Columellar membrane. d. Columella. The dark 
mass between the columella and columellar membrane is the spo- 
rules. e. Opercular membrane. f. Operculum. g. Point where 
the columellar is attached all round to the theca. A little above 
this point the dehiscence of the operculum will take place. A. The 
pedicel of the columella. 
3R2 
