368 



with Sfellarifi /nonifusa (see fig. 6), Cochlearia officinalis f. 

 initior witli miiiierous cotyledonous plants, Glyceria vilfoidea 

 or Dnjas^ now new ones, wliicli are still standing with sharp 

 edges withont any Vegetation, or beginning ones, which are 

 as yet represented only by line scratches. 



It was not until I saw the ontmost, arched parts of the 

 check-field that I had a clear understanding of the formation 



""^S^P^ 





Fig. 7. Sliding clay ("Rudemark") with semi-covered Silene-iuils. Fame 

 Islands. (From photo, by Chr. Kruuse). 



of this net of cracks. Here the clay was evidently in move- 

 ment in the wet season. In the spring the whole mass, soa- 

 ked and plastic, will slide gently downwards to the beach, 

 where the breakers successively lick it away. The bottom 

 is here naked, at the most covered with flat pebbles, but 

 here and there, with long intervals stand tufts of Silène 

 acaulis, Armeria sihirica, Arenaria ciliata, Taraxacum phy- 

 matocarpum, Stereocaulon denudatum v. jjulvinatum, Cetraria 



