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*-mf^ f 



FIG. 36. Mucor. 



A, portion of mycelium of M. mucedo (my} with two aerial hyphse 

 (#. hy\ each ending in a sporangium (spg). 



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

 toplasm (plsm)and cell-wall (c w). The scale above 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 distally, forming 

 the columella. 



D 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' J applies to c 1 c 2 , D 1 , and E. 



