64 



from the Sound or the ocean to escape the effects of salt spray; 

 to be hospitable homes for Gyrophora or Umbilicaria. The 

 chances against the establishment of the species, in the trans- 

 mission of their spores, probably from Connecticut, to such 

 boulders and of finding promptly their proper algal symbiont, 

 Cystococcus, with fortunate moisture and temperature to ger- 

 minate, would seem to be stupendous. But here they are on this 

 split boulder at Wading River and they look as if they had been 

 there for centuries. Birds or the wind must have carried the 

 spores many times before one or the other agency landed them 

 at the right time and place, and Cystococcus was there waiting, 

 and this isolated colony started. 



Hollis, Long Island 



