Fig. 36. — Mucor. 



A, portion of mycelium of M. mucedo (fny) 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 (r. zv). The scale above B applies to this 

 figure only. 



c', immature sporangium, showing septum {sep) and undivided pro- 

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

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

 the columella. 



I)^, 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. 



The scale above c^ and D^ applies to c^, c''', D^, and E, 



