978 



INDEX 



Wilder, F. P., 777 



Williams, H. S., 494, 545, 587 



Willis, B., 90, 170, 301, 309, 3<>(>, 111, 



475, 492, 642, 755, 775, 801, 815, 



887, 890 

 Williston, S. W., 652, 672, 747, 764, 



820, 920, 930 

 Winchell, N. H., 891, 930 

 Wind, abrasion by, 100 

 Wind-gaps, 173 

 Wind-ripples, 99 

 Winds and vegetation, 100 

 Winslow, A., 517 

 Wisconsin glacial epoch, 874, 877 

 Wood, composition of, 634 

 Woodward, A. Smith, 804 

 Woodward, R. S., 366, 617 

 Woodworth, J. B., 627, 884 

 Worthenia tabulata, 658 

 Wright, G. F., 930 

 Wyandotte Cave, 208 



Xenoneura antiquorum, 595 

 Xenophora conchyliophora, 827 



Yarmouth interglacial interval, 874, 



876 



Yellowstone, Fall of, 154 

 Young, C. A., 328 

 Youth of valleys, 129 

 Youthful topography, 130 

 Yule limestone, 629 



Zaphrentis, 552 



centralis, 610 



ponderosa, 581 



umbonata, 552 

 Zechstein, 664 

 Zeolites, 81, 326 

 Zeuglodons, 793 

 Zinc in Illinois, 517 



in Iowa, 517 

 Kansas, 597 

 Missouri, 517, 597 

 Wisconsin, 517 

 Zone of fracture, 199 

 Zonites priscus, 655 

 Zonitoides minusculus, 889 

 Zygospira recurvirostris, 528 



