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| 1 | The type (holotype) redrawn. Ventral view of specimen, retaining in part the two pairs of walking legs, the balancing legs and swimming legs. The last joint of the swimming leg is developed into a spine. The operculum with the opercular appendage and the attachment areas of the gill plates on the sternites are seen. Natural size |
| 2 | A larger specimen showing faint outline of lateral eyes, and some of the legs Horizon and locality. Kokomo waterlime. Kokomo, Ind. |
Stylonurus (Drepanopterus) longicaudatus nov.
Page 316
See plates 54–56
| 3 | Ventral view of a young individual (paratype) showing the outline of carapace and its broad rim, position of eyes, some of the legs and the styliform telson. Natural size Horizon and locality. Kokomo waterlime. Kokomo, Ind. |
The originals of figures 1 and 3 are in the museum of Chicago University, that of figure 2 in the State Museum
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