. The Eurypterida of New York. Eurypterida; Paleontology. Figure 15 Eurypterus fischeri Eichwald. Metastoma, showing the deep furrow of the an- terior portion. (From Holm). Figure 16 Diagram of sagittal median section through Eurypterus: 7, metastoma; 8, operculum; 2, 3, 4, 5, endognathites. (Gaskell's reconstruction) outline, while those of Hughmilleria and Pterygotus show a strong tendency to become wider in the anterior half and narrower in the posterior, and at the same time more deeply emarginate in front. In Slimonia this tendency is carried to an extreme, the metastoma having become ver
. The Eurypterida of New York. Eurypterida; Paleontology. Figure 15 Eurypterus fischeri Eichwald. Metastoma, showing the deep furrow of the an- terior portion. (From Holm). Figure 16 Diagram of sagittal median section through Eurypterus: 7, metastoma; 8, operculum; 2, 3, 4, 5, endognathites. (Gaskell's reconstruction) outline, while those of Hughmilleria and Pterygotus show a strong tendency to become wider in the anterior half and narrower in the posterior, and at the same time more deeply emarginate in front. In Slimonia this tendency is carried to an extreme, the metastoma having become very elongate-cordate with a narrow posterior half and a deeply emarginate anterior one. In DoHchopterus and the Stylonurus branch in general, again a different tendency is developed. Here the base of the naetas- toma becomes rectangular, the lateral margins subparallel and the plate approaches a long rectangle, with the short front side deeply emarginate (Stylonurus) or it becomes lyrate (DoHchopterus). Finally, in Eusarcus. 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
