v.] MOULDS. 41 



y. Treat with iodine and magenta; the proto- 

 plasm is stained. 



3. Treat another specimen with Schulz's solu- 

 tion j the wall is stained violet. 



b. The sporangia or asci. 

 Examine with |- 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, 

 y. The projection into the sporangial cavity of 



the convex septum (columdla} 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). 

 {3. Their form ; cylindrical and elongated, 

 y. Their structure. 

 8. Stain with iodine and magenta. 



