University of Texas Bulletin 



No. 1762: Novemtoer 5, 1917 



THE PERE^O - CARBONIFEROUS AMMONOIDS 

 OF THE GhASS MOUNTAINS, WEST TEXAS, ; 

 AND THEIR STRATIGRAPHICAL SIGNIFICANCE 



By 

 Emil Bose 



- »• •.. , 



»'-=y 



APPENDIX 



On Some Nevs^ Ammonoids and the Successiqh of the Ammonoid-Bearihg Horisons 

 of the Permo-Carboniferous in Central Texas 



BUREAU OF ECONOMIC GEOLOGY AND ^ TECHNOLOGY , 

 -Division Of -Eoonomt'c GieoLOGT',,.." ' . . .' . 



J. A. Udden. Director of the. Bureau and. l^eaAlof the -Division' 



Published by the Uiliversity six times a month an)3 entered 

 second-class matter^at the postoflBce at 

 AUSTIN, TEXAS 



