Page:The Eurypterida of New York Volume 1.pdf/286

 specimen of   which retains both in full length, distinctly shows that there was a considerable difference in the two pairs, the fourth being shorter in total length by about one sixth, and each of its segments a little shorter than the corresponding one of the fifth [pl. 49, fig. 6]. In  Laurie, where the last two pairs are also shown, this difference is still greater [text fig. 62] and the same is suggested by Laurie's drawing of   [1892, pl. 2, fig. 10]. It would seem then that all specimens of Stylonurus, except the original, exhibit a distinct difference in length between the last two pairs of legs. From the two figures of, published successively by Woodward [1865, pl. 13, fig. 1; 1872, pl. 21, fig. 1], it also becomes obvious that that specimen must possess the same