392 ERNST 0STRUP 



i 



Apart from the months, January, March and October, in which 

 less than 37 samples are present, the rest must be placed in the 

 following order, according to their percentages : September 45, April 

 43, May 38, June 35, August 27, July 21. 



This shows, that the number of the characterising forms in- 

 creases with July in both directions. 



