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Whitfield. 1885. Science, 6: 87, 88, fig.

Whitfield. 1885. Amer. Mus. Nat. Hist. Bul. 1: 187, pl. 20

Scudder. 1885. Zittel's Handbuch der Palaeontologie, 1 Abth., 2 Bd., p. 739, fig. 915a.

Thorell. 1886. American Naturalist, 20: 269

Whitfield. 1886. Science, 7: 216

Scudder. 1886. U.S. Geol. Surv. Bul. 31: 28

Laurie. Royal Soc. Edinburgh Trans. 1899. 39:557, pl. 3

Pocock. 1901. Quart. Jour. Micr. Sci., ser. 2, 44: 309

Fritsch. Palaeozoische Arachniden, 1904. p. 65, 78, fig. 81

Fritsch. Miscel. Pal. I. Palaeozoica, 1907, p. 6, pl. 3

In addition to its eurypterids the Bertie waterlime of New York has furnished a specimen of a scorpion which represents one of the four species of Siluric scorpions now known. As it is not only associated with the eurypterid fauna, but also related to it structurally, we have thought it well to include the following note on this unique fossil, especially as it has been the object of much debate.

This scorpion was discovered in 1882 by Mr A. O. Osborn in the waterlime of Waterville, Oneida co., N. Y. Although found before the three European species, the discovery was not announced until 1885, shortly after the news of the discoveries of the Swedish and Scottish Siluric scorpions had aroused the interest of paleontologists. Professor Whitfield, to whom the specimen had been sent by Mr Osborn, first gave a brief description and figure of it in Science and in the same year produced a more elaborate description with figures in the Bulletin of the American Museum of Natural History.

In the first paper the scorpion was referred to Palaeophonus (the genus to which the other Siluric forms belong), but in the later publication a new genus, Proscorpius, was proposed for it, mainly from the supposed presence of double claws on the walking legs. Scudder [Zittel's Handbuch der