Platb V. a. Fruiting Polytrichum commune, X -i- dry. b. The same 

 moist with the calyptra removed, c. I^eaf of the same, X lo. d. Capsule of 

 the same, X 5- e. Capsule of P. Ohioense, X 5- f. Male plant of P. com- 

 mune, _X I. S a^d ^ P- piliferum., dry and wet X i. o. Leaf of P. 

 juniperinum, X lo. 6. Portion of the same, X 30. p. Leaf of P. 

 piliferum, X 10. 



