FIG. 57. i, Olpidium pendulum, immersed in a pollen 

 grain of a conifer, the swarmsporangium liberating one-ciliate 

 swarmspores or zoospores (after Braun) ; 2, Lagendium 

 Rabenhortsii , producing oospores, growing in the filament of 

 a fresh-water alga (after Zopf) ; 3, Leptomitus lacteus, the ter- 

 minal portions transformed into zoosporangia ; 4, biciliate 

 zoospores of L. lacteus ; 5, Achlya racemosa, the terminal 

 cell a zoosporangium liberating zoospores which form a 

 compact ball at the mouth of the zoosporangium ; lower 

 down on the branch are oospores with antheridia; 6, A. 

 racemosa, oogonium containing two oospheres : an anther- 

 idium is penetrating the oogonium (after De Bary) ; 7, 

 zygospore of Mucor stolonifer : the upper cell is a large sus- 

 pensor and should be smooth, not warted, as shown by 

 mistake : the suspeniors vary much in size ; 8, Mucor 

 mucedo, sporangium seen in optical section, showing col- 

 umella and a few contained spores. All highly mag. 



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