v.] MOULDS. 41 



y. Treat with iodine and magenta; the proto- 

 plasm is stained. 



8. Treat another specimen with Schulz's .solu- 

 tion ; the wall is stained violet. 



b. The sporangia or asci. 

 Examine with \ obj. 



a. Their size andform. 



b. Their structure. 



a. The homogeneous enveloping sac covered by 



irregular masses of calcic oxalate. 

 P. The granular protoplasmic contents : un- 



segmented in some ; divided into a great 



number of distinct oval masses (ascosporcs) in 



others. 

 y. 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 Schulz's 

 solution. 



c. The ascospores. 



a. Crush some ripe asci by gentle pressure upon 



the cover-glass. Examine with \ obj. 

 a. The size of the ascospores (measure). 

 /?. Their form ; cylindrical and elongated, 

 y. Their structure. 

 8. Stain with iodine and magenta. 



