340 Postelsta 
phase of the same process are the spherical 
concretions. These structures from a chestnut 
to hundreds of tons in size, are among the most 
interesting geological features of the shore. ‘The 
smallest seldom attract attention; they are of 
the size of marrowfat peas. But east of the 
Station, past two or three projecting points of 
the coast, is an area just above high tide where 
the sandstone layers are quite nearly horizontal. 
Many tide-pools are here, washed out of the 
softer sandstone, and here also are many con- 
cretions. One spot contains so many of these 
spherical masses from two to four inches in di 
ameter that it-has been named the ~ Devils 
Billiard. -Table:”* -A “hundred paces frome, 
towards the Station, is another spot where the 
spherical bodies are quite as numerous but of 
only one-fourth to one-half the size of those on 
the Devil’s table. 
More generally distributed, however, are the 
larger -concretions- from the ‘size of a- quart 
measure to that of a five-gallon jug. These 
frequently are encircled by an outer ring or two, 
reminding one of pictures of the planet Saturn 
