1804R. PercivalAcct of Cape of G.H. 170The spring adder derives its name from springing backwards at its object. Its spring not a little resembles those of a tumbler exhibiting his feats of activity. In size it is small, from two to three feet in length but very dangerous.
1819G.M. KeithVoy. 70The spring adder, very dangerous, but not common...Jet black with white spots.
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