40 ELEMENTARY BIOLOGY. [V. 



S. Treat another specimen with Schultze's solu- 

 tion; the wall is stained violet. 



b. The sporangia or asci. 



Examine with J- obj. 



a. Their size and form. 



b. Their structure. 



a. The homogeneous enveloping sac covered by 

 irregular masses of calcic oxalate. 



^. The granular protoplasmic contents: un- 

 segmented in some; divided into a great 

 number of distinct oval masses (ascospores) in 

 others. 



7. The projection into the sporangial cavity of 

 the convex septum (columella) which separates 

 the hypha from the sporange. 



8. The collar projecting around the base of the 

 columella of burst sporangia. 



c. Stain some with iodine; others with Schultze's 

 solution. 



c. The ascospores. 



a. Crush some ripe asci by gentle pressure upon 

 the cover-glass. Examine with J obj. 



a. The size of the ascospores (measure). 



/5. Their form ; cylindrical and elongated. 



7. Their structure. 



S. Stain with iodine and magenta. 



