Page:The Eurypterida of New York Volume 1.pdf/423

 convex, the antelateral angles prominent, well rounded; the basal margin straight transverse. The lateral eyes are large, a little more than one third the length of the carapace, subcircular, situated as stated. The type is 4.7 mm long and 5.5 mm wide.

This species is based on several small carapaces with portions of the abdomen and a leg [see text fig. 99] which suggest the following description:

Carapace subrectangular, broad, length to width as 5:8. Lateral margins nearly straight, slightly converging forward, anterior margin gently emarginate in the middle, posterior margin straight transverse. Lateral eyes very large, between one half and one third the length of the carapace, circular, situated subcentrally, as far apart as their length. Basal margin straight transverse. Lateral and anterior margins with a broad thick border, probably originating from a doublure on the underside. Body slender, hardly expanding posteriorly and gradually contracting to postabdomen. One leg [see text fig. 99] observed which appears to consist of spineless tubular, striated segments, as in Stylonurus. Length of carapace of type [text fig. 99], 5 mm; width, 7.5 mm.

We have referred this species to Stylonurus rather than to Eurypterus on account of the aspect of the carapace, with its broad border, large eyes and broad, subrectangular outline; the slender form of the leg which resembles the posterior walking leg of Stylonurus.