FIG. 36. Mucor. 



A, portion of mycelium of M. mucedo (my) with two aerial hyphas 

 a. hy), each ending in a sporangium (sfg). 



B, small portion of an aerial hypha, highly magnified, showing pro- 

 toplasm (plsm) and cell- wall (c, iv). The scale above B applies to this 

 figure only. 



c 1 , immature sporangium, showing septum (sep) and undivided pro- 

 toplasm : c 2 , mature sporangium in which the protoplasm has divided 

 into spores ; the septum (sep) has become very convex dismally, forming 

 the columella. 



i) 1 , mature sporangium in the act of dehiscence, showing the spores 

 (sp) surrounded by mucilage (g) ; D 2 , small portion of the same, more 

 highly magnified, showing spicules of calcium oxalate attached to wall. 



E, a columella, left by complete dehiscence of a sporangium, showing 

 the attachment of the latter as a black band. 



The scale above c 2 and D 1 applies to C 1 , c 2 , D 1 , and E. 



