EXPLANATION OF PLATE XVII 



Crilnaria arn'tllacra (Pers.) SrhrMcl., p. 21S. 

 Fig. 1. SporniiKiuni, hi.Lihl\ inaKiiirted. 



Cnhraiia iriiurottir/Hi Schiad., p. 219. 

 Fipc- 2. Sporanfz;iuiii, lii,L;lil\ inajiiiified. 



Crilnaria auranlicua Sclirad., p. 221. 

 Fi<?. 3. Sporangium roiitaining spores, X 30. 



Crihraria microcarpa Schrad., p. 226. 

 Fig. 4. Sporangium containing spores, X 30. 



Crihraria tcnrlla Schrad., p. 225. 

 Fig. 5. Sporangium containing spores, X 40. 



Crihraria miTiutissima Sch\v., p. 220. 

 Fig. 6. A single sporangium calyculate, X 50. 

 Fig. 6 a. A smaller sporangium without calyx, with spore-mass. 



Crihraria cuprea Morg., p. 229. 

 Fig. 7. A single sporangium, X 50. 



Crihraria. I'iolacra Rex, p. 227. 

 Fig. 8. A single sporangium, X 40. 



Crihraria piriformis Schrad., p. 224. 

 Fig. 9. A single sporangium, X 30. 



Pcriiliania drpnssa (Libert) Rost., p. 242. 

 Fig. 10. A cluster of sporangia, one open, X 8. 



Pliysariim niiarat/ut'tisr Machr., p. 83. 

 Fig. 11. Single sporangium, X 10. 

 Fig. 11 rt. A cluster of sporangia and hypothallus, X 5. 



