Proc. Staten Is. Assoc. 



Vol. s, Plate 3 





-3 "^•... 



Fig. I. Decodon verticillatus zone, on former shore margin of peat bed at northeast end. 



Fig. 2. Part of the drained lake bottom, northeast end. Decodon zone in the back- 

 ground, Bidens laevis in the foreground. 



Hollick: Silver Lake Basin 



