FAUNAL EVIDENCE AND COBKELATION. 



231 



Table IX. — Summary table for comparing the dwtnbution of Mississipjnan species in the San Juan, Salida, 

 Crested Butte, Aspen, Leadville, Perry Park, Pikes Peak, Canyon, and Larimer County areas — Cont'd. 





San 

 Juan. 



Salida. 



Crested 

 Butte. 



Aspen. 



Lead- 

 ville. 



Perry 

 Park. 



Pikes 

 Peak. 



Can- 

 yon. 



Larimer 

 County. 



PELECYPODA. 



1 



















Streblopteria media 











1 

 1 











3 

 1 









2 



1 



1 























1 











GASTEROPODA. 



3 

 1 



















Orthonychia formosa ? 



















Straparollus luxus 





3 















StraparoUus ophirensis 







2 



(?) 















1 





















2 











Loxonema "^ sp 







2 



1 











Pleurotomaria ? sp. a 









1 









Pie irotomaria ? sp. b 















1 



1 





1 

 1 





1 













CRUSTACEA. 

























1 

 1 









Bevrichia .sp 





































PENNSYLVANIAN. 



Very far the larger ijortion of our collections from Colorado belong to the Upper 

 Carboniferous. The}' come mainly from three di.stinct and separate areas — from the 

 San Juan area, from the Crested Butte quadrangle and its vicinity, and from Lead- 

 ville and its adjoining district — but we have a few fossils from all the Upper Carbon- 

 iferous areas of Colorado except the Fi'ont and Sangre de Cristo ranges. 



UINTA MOUNTAIN REGION. 



About the paleontology of the Uinta Mountains in Colorado very little can be 

 said. The large faunas cited in Powell's Geology of the Uinta Mountains " came from 

 beyond the borders of the State, in Utah, though the same horizons, characterized 

 by the same faunas, doubtless extend to the eastern end of the range. The faunas 

 identified by White, however, are different from any of the f ormational faunas known 

 in Colorado. We have collections from but three stations in the Uinta Mountain 

 area in Colorado, and the faunas in each case are so scanty as to be without weight in 

 the matter of correlation. The species collected are as follows: 



Eupheinui< suhpajnllosus is from near the South Fork of the Vermilion and near 

 the ea.st base of Diamond Peak, Colorado (station 2189). These fossils were not found 



oU. S. Geol. Geog. Surv. Terr,, Powell's Rept. Geology Uinta Mountains, 1876. 



