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PRODUCTION OF ZOOSPORES IN ACHLYA. 



for a time to be distinguishable. Very speedily, however, its 

 endochrome shows the appearance of being broken up into a large 

 number of distinct masses, which are at first in close contact with 

 each other and with the walls of the cell (Fig. 152, a), but which 

 gradually become more isolated, each seeming to acquire a proper 





Development of Achlya prolifera: — a, dilated extremity of a 

 filament b, separated from the rest by a partition «, and con- 

 taining gonidia in progress of formation ; — b, conceptacle dis- 

 charging itself, and setting-free gonidia, a, b, c ; — c, portion of 

 filament, showing the course of the circulation of granular 

 protoplasm. 



cell-wall ; they then begin to move about within the parent-cell ; 

 and, when quite mature, they are set free by the rupture of its 

 wall (b), to go forth and form new attachments, and to develope 

 themselves into tubiform cells resembling those from which they 

 sprang. Each of these ' motile gonidia ' is possessed of only two 

 cilia ; their movements are not so powerful as those of the zoo- 

 spores of Vaucheria ; and they come to an end sooner. This 



