38 ELEMENTARY BIOLOGY. [V. 



/3. The intermixed Torulce. Note their size and 

 number. 



6. Hold a bit of the mycelium between two pieces 

 of carrot, and cut a thin vertical section with a 

 sharp razor : mount in water and examine with 

 low and high power. 



b. The submerged hyphse. 



Small branched threads hanging down from the under 

 surface of the mycelium : repeat the observations 

 2. a. a. a. 



c. The aerial hyphae and conidiophores. 



Tease out in water a bit from the surface of one of the 

 greenish patches; observe the difficulty with which 

 water wets it. Examine with low and high power. 



Note ; 



a. The primary erect hypha. 

 /3. Its division into a number of branches. 

 7. The division of the terminal branches by con- 

 strictions into a chain of conidia. Draw. 



d. The conidia. 



a. Their Size (measure). 



Form ; spherical. 



Structure ; sac, protoplasm, vacuole. 



b. Stain with magenta and iodine. 



c. Treat another specimen with potash. 



e. The germination of the Conidia, and building up 



of the Mycelium. 



a. Sow some conidia in Pasteur's fluid in a watch-glass ; 

 protect from evaporation, and watch the development 



