FIG. 37. Mucor. 



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

 a. hy], each ending in a sporangium (spg). 



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

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

 figure only. 



C 1 , immature sporangium, showing septum (scp) and undivided pro- 

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

 into spores ; the septum (sej>) has become very convex, distally forming 

 the columella. 



D\ mature sporangium in the act of dehiscence, showing the spores 

 (sp) surrounded by mucilage (g] ; D' ! , 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. 



