MtrSHEOOM 305 



any great extent? Do they branch? Examine 

 the individual cells. "What is their shape ? Ar- 

 rangement ? Structure of their walls ? What do 

 the cells contain ? How do those near the centre 

 of the section compare in diameter with those at 

 the margin? Does the annulus have the same 

 structure as the stipe ? In what direction do the 

 end walls of the cells run? Compare a single 

 row of cells with a hypha. Is the stipe anything 

 more than a mass of hyph«? Stain the section 

 with Schulze's solution. Note the color assumed 

 by fungus cellulose. Is it the same as ordinary 

 cellulose ? Do the cells contain starch ? Draw 

 your sections, showing aU. of the features ob- 

 served. Make a transverse section of the stipe, 

 and examine in dilute glycerine. Compare with 

 the longitudinal section. Note the large, nearly 

 circular, intercellular spaces. "Where are they 

 most numerous ? What is the shape of the hy- 

 phas in trans-section ? Do they vary in diameter ? 

 If so, where are the largest ? Notice that some 

 of the hyphse show in the centre a highly re- 

 fractive spot. Can you find any trace of this on 

 the end walls in the longitudinal section of the 

 stipe ? Draw. 



The pileus. — Make a vertical section passing 

 through the middle of the pileus and of the stalk, 

 and examine under a high power. Is the struct- 

 ure of the mass of the pileus the same as that of 

 the stipe ? What course do the hyphse take upon 

 entering the pileus ? Do the hyphse extend into 

 the gills ? Make a diagram showing the course 

 of the hyphae through the entire plant. Make 



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