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SPECIFIC MICRO-ORGANISMS 



FIG. 89. Mucor mucedo. i, A sporangium in optical longitudinal section: 

 c, columella; m, wall of sporangium; sp, spores. 2, A ruptured sporangium with only 

 the columella (c) and a small portion of the wall (m) remaining. 3, Two smaller 

 sporangia with only a few spores and no columella. 4, Germinating spores. 5, 

 ruptured sporangium of Mucor mucilaginus with deliquescing wall (m) and swollen 

 interstitial substance (z); .>/>, spores. (From Jordan after Brefeld.) 



FIG. 90. Mucor corymbifer. (From Plant after Lichthelm.} 



