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| 1 | Relatively broad carapace and first tergite, showing the triangular scales at the base. Natural size |
| 2 | Carapace, preabdomen and two postabdominal segments, showing eyes, ocellar mound, surface sculpture of tergites, and the postlateral lobes of the postabdominal segments. Natural size |
| 3 | Dorsal view of last postabdominal segment, showing posterior emargination. Natural size |
| 4 | Ventral view of proximal portion of telson, showing hinge and carina. The apparent incisions of the margin are due to cracking of the thickened edge. Natural size |
| 5 | Ventral view of an obliquely crushed telson. Natural size |
| 6 | Dorsal view of nearly complete telson. Natural size |
Originals (Sarle's cotypes) are from the Pittsford shale, Pittsford, Monroe co., N. Y., and in the State Museum
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