Capt. Lewis, February 25, 1806--the small gray squirrel common to every part of the rocky mountain which is timbered, difirs from the dark ...  more>>

Erxleben, Johann Christian Polykarp, Systema regni animalis per classes, ordines, genera, species, varietates, cum synonymia et historia animalium., Weygandianis, Lipsiae, 1777