The Collaborative International Dictionary
suckanhock
Seawan \Sea"wan\, Seawant \Sea"want\, n. The name used by the Algonquin Indians for the shell beads which passed among the Indians as money.
Note: Seawan was of two kinds; wampum, white, and
suckanhock, black or purple, -- the former having
half the value of the latter. Many writers, however,
use the terms seawan and wampum indiscriminately.
--Bartlett.
Wiktionary
suckanhock
n. (context rare English) suckauhock, a dark-coloured kind of shell-money, used by Native Americans.