Horseshoe Crab, Limulus polyphemus

An icon of coastal New England, the horseshoe Crab is basically a living trilobyte. If you've ever had a flu shot, know someone with a pace maker or joint replacement, or have given your pet a rabies vaccination, you owe a debt of gratitude to the horseshoe crab. All kinds of medicines were originally checked for safety using a test that comes from the blood of horseshoe crabs! CARDS ARE 4 x 6 AND COME IN BOXED SETS OF 12 CARDS & ENVELOPES.