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File:The Eurypterida of New York plate 84.jpg

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Eusarcus longiceps nov. Page 257 1 Carapace of young specimen showing outline and position of lateral eyes. Natural size 2 Carapace of young specimen with traces of ornamentation 3 Well preserved specimen, showing marginal border and outline of ventral side (as darker rim). Probably somewhat compressed in posterior part. Natural size 4 Largest carapace observed. The lateral margin is partly folded under and the specimen appears therefore too narrow. The lateral eyes and ocelli are well preserved in the specimen; the former are somewhat displaced by the folding. Natural size 5 Carapace and preabdomen; the former apparently retaining the original outline. Type. The preabdomen is imperfect. Natural size 6 Large carapace with the marginal shield of the ventral side thrown outward in the posterior part. Natural size

Eocarcinosoma (Eusarcus) triangulatus nov. Page 258 7 Largest and most perfect carapace observed, apparently but little distorted and retaining the first tergite. Type. Natural size 8 Small carapace with fragment of first tergite. × 2 9 Carapace and preabdomen much distorted, but showing their great width. The swimming leg is too indistinct for accurate figuring. Natural size

Disjecta membra referable to Eusarcus 10 Metastoma, possibly belonging to Eusarcus longiceps. × 2 11, 12 Metastomas, possibly belonging to Eusarcus triangulatus. Natural size 13–16 Patches of integument exquisitely retaining the ornamentation. The latter exhibits considerable variation, recalling the ornamentation of Eusarcus and Echinognathus. Figure 13, × 4; figure 14, × 5; figure 15, × 2; figure 16, × 5 17 Portion of abdomen, comparable in outline to that of a Eusarcus. Natural size 18 Postabdominal segment, recalling that of a Eusarcus. Natural size 19, 20 Spines of endognathites, belonging to this genus, or to Echinognathus or Stylonurus. Natural size Horizon and locality. Lower Siluric: Schenectady shale. The originals of figures 1–7, 10, 11, 13–16, 18–20 are from the Dettbarn quarry at Schenectady, those of figures 8, 9 from Duanesburg, that of figure 12 from Rotterdam Junction and that of figure 17 from Aqueduct, all in Schenectady county. All originals are in the State Museum

The Eurypterida of New York. Volume 2. New York State Museum Memoir 14, plate 84
日期
來源 California/Google Books
作者 John Mason Clarke (1857-1925) and Rudolf Ruedemann (1864-1956)
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本作品作者於1956年逝世,在其來源國以及其他著作權期限是作者逝世後60年或以下的國家與地區屬於公有領域


這個作品在美利堅合眾國屬於公有領域,因為它首次發布早於1929年1月1日,或於該日期之前在美國著作權局登記。

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目前2011年6月17日 (五) 12:42於 2011年6月17日 (五) 12:42 版本的縮圖973 × 1,336(300 KB)Enomil{{Information |Description=''The Eurypterida of New York''. Volume 2. New York State Museum Memoir 14, plate 84 |Source=[http://babel.hathitrust.org/cgi/pt?id=uc1.31822000675504 California/Google Books] |Date=1912 |Author=John Mason Clarke (1857-1925) and

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