. The Eurypterida of New York. Eurypterida; Paleontology. THE EURYPTERIDA OF NEW YORK 59 the metastoma has become sub triangular or cordate in outline, the anterior portion being greatly widened and emarginate and the posterior tapering to a blunt point. We have thus at least four distinct lines of development of the metas- toma, which fully correspond to the four principal branches of the euryp- terids here distinguished [see chapter on Phytogeny, p. 124] namely, that of Eurypterus, of Pterygotus, of Eusarcus and of Stylonurus. II m IV. Please note that these images are extracted from scanned

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. The Eurypterida of New York. Eurypterida; Paleontology. THE EURYPTERIDA OF NEW YORK 59 the metastoma has become sub triangular or cordate in outline, the anterior portion being greatly widened and emarginate and the posterior tapering to a blunt point. We have thus at least four distinct lines of development of the metas- toma, which fully correspond to the four principal branches of the euryp- terids here distinguished [see chapter on Phytogeny, p. 124] namely, that of Eurypterus, of Pterygotus, of Eusarcus and of Stylonurus. II m IV. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Clarke, John Mason, 1857-1925; Ruedemann, Rudolf, 1864-1956. Albany, New York State Education Department

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Keywords: ., bookcentury1900, bookdecad, booksubjectpaleontology, bookyear1912