© 2014 by The University of Chicago. All rights reserved. The comparative method of historical linguistics is carefully applied to the hypothesis that Chitimacha, a language of southern Louisiana now without fully fluent speakers, and languages of the Totozoquean family of Mesoamerica are genealogically related. Ninety-one lexical sets comparing Chitimacha words collected by Swadesh (1939; 1946a; 1950) to words reconstructed for Proto-Totozoquean (Brown et al. 2011) show regular sound correspondences. Along with certain structural similarities, this evidence attests to the descent of these languages from a common ancestor, Proto-Chitimacha-Totozoquean. By identifying regular sound correspondences, the phonological inventory and some of the ...