Chapter XI — 175 — Carnivorous Fungi 



The significance of carnivory for Zoophagus (and hence by implica- 

 tion for fungi in general) has been indicated experimentally by Gickl- 

 HORN (1922). By culturing it for two months in properly prepared 

 water, free of animals, he found that it could persist saprophytically, 

 as many other fungi do. Under these conditions, however, it became a 

 "hunger form", with the "long hyphae", though normal as to branch- 

 ing, weakly developed, and with depreciated cellular contents. In two 

 days after the addition of Rotatoria, the hyphae became appreciably 

 stronger and were well filled with contents, "After such evidence one 

 can hardly avoid the thought that the capture of animals by Zoophagus 

 supplied an important source of nutrition and that we have before us a 

 highly specialized adaptation" {I.e. p. 217). 



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