INDEX 



399 



Worms, 13, 18, 53, 73. 



Worthen, A. H., 176. 



Wyoming, 65, 84, 102, 160, 164, 181, 



182, 205, 220, 242, 256, 287, 288, 



303. 



Yellowstone Park, 303. 



Yorktown formation, 282. 

 Yosemite Valley, 301. 



Zaphrentis, 113. 

 Zinc ore, 90, 153. 

 Zittel, Carl, 13. 

 Zittel-Eastman, 34. 



