and on the Sexes of Mosses. 483 



Pig. 11. The seta of the two preceding figures, dissected out, to show the ori- 

 ginal cell still tipping the conical extremity. 



Fig. 12. An anther of OrtJiotrichum anomalum, with a jointed filament arising 

 from its base. 



Fig. 13. The conical extremity of the seta of Dicranum Jiexuosum dissected 

 from the vaginula. When confined by the vaginula the extremity 

 is closely pressed to the seta. 



Fig. 14. A hud o( Funar la hi/grotnetrica, 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. b. A pistillum more advanced, with its cell. 

 c. A pistillum still more advanced. 



Fig. 1.5. A more advanced pistillum from the same plant, a. The apex of the 

 stem. b. 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. 



Fig. 16. The same, still more advanced. 



Fig. 17. The same, just after the separation of the pistillum to form the caly- 

 ptra. a. The apex of the stem. b. 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. 



Fig. 18. A section of the theca of Gi/ninostomum pi/riforme, 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 wiiere 

 the columellar is attached all round to the theca. A little above 

 this point the dehiscence of the operculum will take place, h. Tiie 

 pedicel of the columella. 



3 R 2 



