| 1 | Metastoma found in association with remains of this species. × 5 |
| 2 | Fragment of a metastoma. × 3 |
| 3–5 | Tergites showing slight differences in the characteristic ornamentation. Figure 3, natural size; figures 4 and 5, × 3 |
| 7 | Fragment of leg joint exhibiting an ornamentation that suggests its reference to S. myops. × 3 |
Stylonurus sp. α
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| 10 | Fragment of postabdominal segment showing the ornamentation consisting of spines of which only the bases are retained, × 3 |
| 11 | Leg joint with bases of large marginal spines. × 3 |
| 8, 12 | Fragments of abdominal segments. × 3 |
Stylonurus sp. β
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| 14, 15 | Leg joints of uncertain specific relations. × 3 |
Stylonurus sp. γ
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| 19 | Terminal joints of leg. Natural size |
Stylonurus sp. δ
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| 6, 9 | Fragments of integuments showing peculiar character of ornamentation. Natural size |
| 13 | Segment with serrated posterior margin. × 3 |
Stylonurus sp.
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| 20 | Distal joints of a leg indicating an individual of considerable size. Natural size |
| 18 | Articulation of two leg joints. Natural size |
Genus undet.
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| 16, 17 | Fragments of uncertain character, possibly the manducatory edges of coxal joints of a large form |
The originals of this plate are from the Shawangunk grit, Otisville, N. Y., and are in the State Museum
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