Fortunately, there is still alive on the earth one member of this remarkable group—the Limulus, or king-crab.
Of all these the only member alive at the present time is Limulus, or the king-crab.
From the trilobites arose, as evidenced by their larval form, the king-crab group, called the Xiphosura (Fig. 5).
The Tortoise replied, "Your slave donned it forasmuch as your slave saw the king-crab trailing his three-edged pike."
In the illustration is shown the egg of the king-crab one-third larger than life.
A name of the king-crab (Limulus polyphemus), from its supposed resemblance to that instrument.
The compound eye of the king-crab (Limulus) is the only recognized instance of ommatidia in their simplest state.