Fossil eurypterid (sea scorpion) *Pterygotus* sp. claw from the Silurian Bertie Formation of Herkimer County, New York (PRI 50322). Specimen is on display at the [Museum of the Earth](http://www.priweb.org), Ithaca, New York. Length of claw is approximately 9.5 cm. Model by Emily Hauf.