238 



SPECIFIC MICRO-ORGANISMS 



Fig. 91. — 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 spore. S, 

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

 interstitial substance (z) ; sp, spores. {From Jordan after Brefeld.) 



Fig. 92. — Mucor cor[ 



