320 



GEOLOGY OF THE EUREKA DISTRICT. 



The Lower Silurian embraces the fauna of the Pogonip limestone beneath the 

 Eureka quartzite, and the Silurian fauna above the, quartzite is represented by the 

 meager collections obtained from the Lone Mountain limestone. 



Under the grouping of Carboniferous fossils are included the fauna from the 

 great belts of limestone both above and below the Weber conglomerate. 



Included in the list is the collection obtained from the White Pine Mountains, 

 situated about 40 miles southeast of Eureka. The fauna from the base of the 

 Pogonip to the summit of the Devonian is so closely related to that of the Eureka 

 District that they may well be studied together, and in the tables are arranged in 

 parallel columns. 



The reader who desires more detailed information in regard to the specific 

 character of the fauna is referred to the descriptions given in the Paleontology of the 

 Eureka District, above mentioned. 



SYSTEMATIC LIST OF FOSSILS OF EACH GEOLOGICAL HORIZON. 



CAMBRIAN. 



PROSPECT MOUNTAIN TEBRANE. 



[The clonlile multiple (XX) denota that the species passes to the group above.] 



