. The Eurypterida of New York. Eurypterida; Paleontology. Figure 13 Eurypterus fischeri Eich- Figure 14 Eurypterus fischeri Eichwald. wald. Endostoma, seen from below (out- On the left the right coxa, seen from the in- side). (From Holm) tenor and showing the doublure, the large cutting tooth and the smaller teeth; and its connection with the metastoma (on the right), which also shows its interior doublure. (From Holm) strate that it represents the appendages of a distinct suppressed segment. For practical reasons we have not counted this abortive first segment of the preabdomen [see diagram p
. The Eurypterida of New York. Eurypterida; Paleontology. Figure 13 Eurypterus fischeri Eich- Figure 14 Eurypterus fischeri Eichwald. wald. Endostoma, seen from below (out- On the left the right coxa, seen from the in- side). (From Holm) tenor and showing the doublure, the large cutting tooth and the smaller teeth; and its connection with the metastoma (on the right), which also shows its interior doublure. (From Holm) strate that it represents the appendages of a distinct suppressed segment. For practical reasons we have not counted this abortive first segment of the preabdomen [see diagram p. 24]. Gaskell, in his lately published The Origin of Vertebrates, in order to derive a vertebrate prosomatic or oral chamber fully separated from the gill chambers, has assumed that the metastoma and .the operculum of Eurypterus became fused [op. cit, p. 242 and our text fig. 16]. It is safe for us to say that we have no evidence in the eur3^pterids of any tendency toward the fusion of these organs and that it seems to us such a procedure. 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
