Page:The Eurypterida of New York Volume 1.pdf/237

 The presence of the genus Eusarcus in the Frankfort fauna is demonstrated by various characteristic parts of the integument, viz, two forms of carapaces, cordiform metastomas so typical of Eusarcus, extremely broad and short tergites, the long conical postabdominal segments, a telson, and fragments with the characteristic ornamentation. The metastomas are probably the most conclusive of these, no other genus having furnished singularly broad and short subtriangular plates.

The two species here described are for the present entirely based on the carapaces and the other parts of the integument are noted below.

The genus hence comprises the following species: