EXPLANATION OP THE PLATES. 



7. Hedwigidium imberbe. 



a. plant, nat. size. 



b. leaf, magnified. 



c. sporangium, magnified. 



8. Hedwigia ciliata. 



a. plant, nat. size. 



b. leaves, magnified. 



c. tip of leaves, magnified. 



d. sporangium, magnified. 



PLATE XXII. 



1. Encalypta vulgaris. 



a. plant, nat. size. 



b. leaf, magnified. 



c. veil, magnified. 



d. sporangium, magnified. 



e. tip of axis, with archegonia, paraphyses, and vaginula, 



magnified. 



2. Cinclidotus fontinaloides. 



a. plant, nat. size. 



b. leaf, magnified, 



c. veil, magnified. 



d. sporangium, magnified. 



e. portion of peristome and tip of columella, round which 



the tips of some of the teeth are wound, magnified. 



3. Tortula muralis. 



a. plant, nat. size. 



b. leaf, magnified. 



c. sporangium and veil, magnified. 



d. sporangium with lid, magnified. 



4. T. nivalis. 



a. plant, nat. size. 



b. leaf, magnified. 



