PLATE IV. 



1. Neckefa complanata, 



a. leaves, magnified. 



b. leaf-cells, magnified. 



c. sporangium, magnified. 



d. veil, magnified. 



2. N. crispa. 



a. leaf, magnified. 



b. sporangium, magnified. 



c. veil, 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 perichaetium. 



5. 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. 



