FAUNAL EVIDENCE AND CORRELATION. 



261 



Table XVI. — Summary table fur comparing the Upper Carboniferous formational fatmas of tlie San Juan, 

 Crested Bulte, and Leadville and Tenmile districts — Continued. 





San Juan. | Crested Butte. 



Leadville 







Molas. 



Hermosa. 





Maroon. 



Weber. 



Robin- 

 son. 







Low- 

 er. 



Mid- 

 dle. 



Up- 

 per. 



Weber. 



Low- Mid- 

 er. die. 



Up- 

 per. 



Maroon. 



pELEdYPODA— continued. 

 Alierisma terminale 









1 

 2 



2 









ChEenomva leavenworttiensis 





















SCAPnOPODA 

























1 











GASTEROPODA, 



Platyceras parvum 





1 



1 



















1 







- 1' 



1 



1 











1 

















1 







Worthenia? lasallensis? 





1 

















1 

 1 

 1 





Worthenia? sp. a 



1 











Phancrntrcma of. gravvillense . 



' 







i 









! 







1 



■ 1 

























Loxonema sp 



. " . 











1 







Bulimnrpha chrj'salis 





















Enomphalus catilloides 











] 

 2 

 1 















1 











1 

 1 





Bt'llcrophon crassus 





1 







1 













Bellerophon pcrcarinatus? 

















1 













2 









1 













1 

















EuphemUB nodocarinatiLS 























CEPHALOPODA. 





































- 







1 

 CRUSTACEA 



I'hillipsia major 





1 









1 









Phillipsia tnnanleata 





V 



















1 

































Bairdia of. cestriensis 



























































In the above table are given the composite faunas of the Molas and of the lowei-, 

 middle, and upper Hermosa formations in the San Juan region, of the Weber forma- 

 tion and of the lower member of the Maroon in the Crested Butte district, and of 

 the lower, middle, and upper Weber, of the Robinson limestone, and of the Maroon 

 formation in the Leadville and Tenmile districts. The fauna of the Rico formation 

 of the San Juan region has not been found elsewhere in Colorado, and it did not 

 seem necessary to introduce it for comparison. The fauna of the upper Maroon of 



