Field Columbian Museum. 



Publication no. 



Geological Series. Vol. II, No. 7. 



THE CARAPACE AND PLASTRON 



OF BASILEMYS SINUOSUS, 



A NEW FOSSIL TORTOISE FROM THE 

 LARAMIE BEDS OF MONTANA. 



BY 



Elmer S. Riggs, 



Assistant Curator, Division of Paleontology. 



Oliver Cummings Farrington, Ph. D. 



Curator of (leology. 



CO 





Chicago, U. S. A. 

 F'ebruary 1, 1906. 



