Bed of sea urchins found 
6 feet 2 inches above contact between 
zones 13 and 14 ; actually 42 inches above 
base of zone 16 in loose yellow sand of 
zone 16 (Choptank) and above the blue clay 
B/l9bhs -of a mils south of mouth of 
Parker Creek,Calvert County,Maryland 
/ iZ ?7 
