Page:The Eurypterida of New York Volume 1.pdf/249

 The telson is furnished with small circular scales on the swollen basal part and with long spinelike scales on the remainder.

Horizon and localities. Remains of this species have been found only in the Bertie waterlime quarries at Williamsville and Buffalo, N. Y.

Observations. The relative size of some of the largest fragments indicates that  reached at least a length of four fifths of a meter or 2–3 feet and thus belonged to the larger members of the eurypterid fauna of the waterlimes. It attained at least half the size of the giants of this fauna, the two species of Pterygotus.

Lacking the long and powerful pincers of those dangerous competitors, the principal or sole organ of defense and offense must have been the telson spine. In correspondence with this important function the postabdomen is so much extended that, with the telson, it greatly exceeds