SUMMAKY OF EESULTS. 



9 



greater detail in the abstract of a report on the geology of the Eureka 

 District, Nevada, by Mr. Arnold Hague, contained in the Third Annual Re- 

 port of the Director of the United States Geological Survey. 



In the accompanying table the number of genera and species known 

 at present in the Paleozoic formations of Central Nevada is given: 



