La Sierra de Catorce en San Luis Potosi es una region rica en evidencia fosil. Este libro es una obra de referencia en cuanto a la flora y fauna que habito esta zona durante el cenozoico, con un enfoque especial en los mamiferos. Ofrece una laboriosa identificacion de cada una de las especies fosiles, clasificando y dando detalles sobre cada una de las especies encontradas.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.