Cool Stars 14 - Submitted Abstract # 350 This version created on 05 October 2006 Extreme Subdwarfs from the rNLTT Catalog J. L. Marshall, Observatories of the Carnegie Institute of Washington D. L. DePoy, The Ohio State University Andrew Gould, The Ohio State University We present the results of a search for low-mass, extreme subdwarfs in the solar neighborhood. The sample is selected from the rNLTT catalog of Salim & Gould (2003) using a reduced proper motion diagram. Photometric and spectroscopic observations of 54 candidate extreme subdwarfs are presented. These extremely metal-poor, low-mass objects are among the oldest stars in the Galaxy and may inform studies of Galactic evolution and the Galactic merger history. Studies of these stars may also provide information about the transition between late-type M dwarfs, L- and T-dwarfs, and giant planets. ----------------------------------