EXPLANATION OF THE PLATES. XXXI 



2. Pottia crinita. 



a. plant, nat. size. 



b. leaf, magnified. 



c. young veil, magnified. 



d. sporangium, magnified. 



e. follicle of P. cavifolia. 



3. Pottia Heimii. 



a. plant, nat. size. 



b. leaf, magnified. 



c. sporangium, magnified. 



4. Campy lopus flexuosus. 



a. plant, nat. size. 



b. leaf, magnified. 



c. veil, magnified. 



d. sporangium, magnified. 



e. part of peristome, margined. 



5. Ceratodon purpureus. 



a. plant, nat. size. 



b. leaf, magnified. 



c. sporangium, magnified. 



d. part of peristome, magnified. 



e. tip of tooth, more highly magnified. 



6. Leucobryum glaucum. 



a. plant, nat. size. 



b. leaf, magnified. 



c. tip of leaf, magnified. 



d. sporangium, magnified. 



e. part of peristome, magnified. 



7. Dicranum scoparium. 



a. plant, nat. size. 



b. leaf, magnified. 



c. part of peristome, magnified. 



8. Dicranella heteromalla. 



a. plant, nat. size. 



