94 MOSS. 



a. The movement. Apply iodine, and watch them as 

 they gradually come under its influence. 



b. The form ; a slender body, with a pair of cilia at 

 the anterior end. 



c. The colorless vesicle sometimes to be seen attached 

 to the posterior part. 



d. Draw. 



Crush an immature antheridium by pressing on the cover- 

 glass, and as the contents escape, notice 



e. The antherozoids coiled within the mother-cell. 



If alcoholic specimens are used, the antherozoids may be 

 seen within the mother-cell, but the parts can not be made 

 out. 



Tear apart a female head, mount, and notice 



4. The paraphyses j shape and structure. 



5. The archegonia. 



a. The enlarged ventral portion. 



b. The long neck. 



c. The short thick pedicel. 



d. Focus upon the surface, and draw some cells of 

 each portion. 



Treat with potassic hydrate to render the archegonia 

 more transparent, focus so as to give an optical section, and 

 notice 



e. The two rows of cells forming the neck, the ter- 

 minal cells of which are 



f. The stigmatic cells. 



g. The canal along the axis of the neck. 



h. The two or more rows of cells surrounding the 



ventral portion. 

 i. The small mass of protoplasm lying deep in the 



center of the ventral portion, the oosphere (if not 



yet fertilized). 



