42S ELEMENTARY BIOLOGY. [CHAP. 



n. Large unbranched hyphce, each ending in a 

 spherical enLargement {sporatigimn). 



3. Examine with J obj. 



a. The hyphae. 



a. Their size ; they greatly exceed the hypha^ of 

 Fenicillinm both in lengtli and diameter. 



fi. Their structure ; homogeneous sac, granular 

 protoplasm, vacuoles : septa absent except 

 close to the sporangium. 



y. Treat with iodine and magenta or ha^ma- 

 toxylin; the protoplasm is stained and nuclei 

 may be made out. 



8. Treat another specimen with Schulze's solu- 

 tion; the cell-wall is stained violet. 



b. The sporangia. 

 Examine with J obj. 



a. Their size and form. 



b. Their structure. 



a. The homogeneous enveloping sac covered by 

 irregular masses of calcic oxalate. 



p. The granular i)rotoplasmic contents : un- 

 segmented in some ; divided into a great 

 number of distinct oval masses (spores) in 

 others. 



y. The projection into tlie sporangial cavity of 

 the convex septum (columella) which separates 

 the hyi)ha from the sporangium. 



S. The collar projecting around the base of the 

 columella of burst sporangia. 



