EXPLANATION OF THE PLATES. "XXXUl 



e. sporangium, magnified. 



/. lid, magnified. 



g. part of peristome, with ring, seen from within, magnified. 



4. Campylostelium saxicola. 



a. plant, nat. size. 



b. plant, magnified. 



c. leaf, magnified. 



d. part of peristome, with ring, magnified. 



5. Rhabdoweissia denticulata. 



a. plant, nat. size. 



b. leaf, magnified. 



c. sporangium, magnified. 



d. part of peristome, magnified. 



6. Weissia controversa-. 



a. plant, nat. size. 



b. leaf, magnified. 



c. sporangium, magnified. 



d. part of peristome, magnified. 



7. Hymenostomum squarrosum. 



a. plant, nat. size. 



b. plant, magnified. 



c. leaf, magnified. 



d. sporangium, magnified. 



e. mouth of sporangium, magnified. 



8. Phascum bryoides. 



a. plant, nat. size. 



b. plant, magnified. 



c. leaf, magnified. 



d. sporangium, magnified. 



9. Physcomitrella patens. 



a. plant, nat. size. 



b. plant, magnified. 



c. leaf, magnified. 



d. sporangium, magnified. 



c 



