GSE se beh 
1902] VEGETATION AT WOODS HOLE 447 
If the pond were larger and deeper than the one shown in 
fig. 6, a pool would remain in the center and we should have a 
fing of vegetation between the ditch and the central pool. 
Indeed there is at least one such veritable atoll in the vicinity 
' at present in question, and it is found in-a larger basin, perhaps 
100 meters in diameter. 
: 
Fic. 6.—Pond-island near Quisset harbor. : 
_ The view is here taken that this atoll at least differs from ae 
e-hole is involved, 
formed instead 
ve itself into 
pond, and 
- te chowed little 
‘of any sort is 
Py 
vation of 
