PLATE IV. 



1. Neckera complanata. 



a. leaves, magnified. 



b. leaf-cells, magnified. 



c. sporangium, magnified. 



d. veil, magnified. 



2. N. crispa. 



a. leaf, magnified. 



b. sporangium, magnified. 



c. veilj magnified. 



3. N. pumila. 



a. leaf magnified. 



b. sporangium magnified. 



c. part of peristome, magnified, seen from within. 



4. N. pennata. 



a. leaf, magnified. 



b. sporangium, magnified, with perichsetium. 

 B. Homalia trichomanoides. 



a. leaf, magnified. 



b. sporangium, magnified. 



c. portion of peristome, magnified. 

 6. Hypnum nitens. 



a. rootlets, magnified. 



b. tip of one more highly magnified. 



c. leaves, magnified. 



d. sporangium, magnified. 



