PLATE XIX. 



1. Pogonatum nanum. 



a. plant, nat. size. d. section of one of the lamellae, mag. 



b. leaves, magnified. e. young veil, magnified. 



c. section of leaves, mag. /. sporangium, magnified. 



2. P. abides. 



a. plant, nat. size. c. young veil, magnified. 



b. leaves, magnified. d. sporangium, magnified. 



3. P. hercynicum. 



a. plant, nat. size. b. leaf, magnified. 



c. sporangium, magnified. 



4. Atrichum undulatum. 



a. plant, nat. size. c. sporangium, magnified. 



b. leaf, magnified. d. sporangium, without lid. 



5. Diphyscium foliosum. 



a. plants, nat. size. d. veil, magnified. 



b. plants, magnified. e. peristome, magnified. 



c. sporangium, mag. /. leaf, mag., with two perichaetial leaves. 



6. Buxbaumia aphylla. 



a. plants, nat. size. c. yeil, magnified. 



b. sporangium, magnified. d. peristome, magnified. 



e. a portion of inner peristome, magnified, 



7. Tetrodontium Brownianum. 



a. plant, nat. size. d. perichsetial leaves, magnified. 



b. plant, magnified. e. sporangium, magnified. 



c. leaf, magnified. f. peristome, magnified. 



8. Tetraphis pellucida. 



a. plant, nat. size. 



b. gemmiferous plant, nat. size. 



c. leaf, magnified. 



d. gemmiferous apex, magnified. 



e. young veil, magnified. 



/. sporangium with lid, magnified. 

 g. sporangium without lid. 



h. peristome, magnified (the transverse lines are too strongly 

 marked). 



