FAUNAL EVIDElSrCE AND COEEELATION. 253 



Table XIV. « — Showi-ng distrihuiion of Pennsylvanian species in the Rico formation of the San Juan region. 





2248. 



2S37. 



2340. 



2341. 



2342. 



2343. 



2.344. 



234.5. 



2346. 



2347. 



2348. 



2349. 



Total. 



BRACHIOPODi.. 



































- 













1 





X : S ■ ■■■ 



X 



v.- 













5 





(''\ 

















(?) 

 6 



Seminula subtilita* 



X '-<' 



X 













X 



PELECYPODA. 





X 





X 

 X 









X 





5 





















1 







X ; X 







< 









X 

















.5 







































1 



Pseudomonotis hawni* ' 



X 















1 









1 









1 















1 



Pseudomonotis sp , >: 

















3 



X 













1 



Monopteria alata : 







1 









1 



















1 























9 







X 

















1 



Sedgwickia topekensis "^ 

















1 



Schizodu.s cuneatus ? 



■ 1 X 















3 























1 













X 

 X 





X 





4 













5 



Pleurophorus occidentalis "^ 















1 







( '-'1 















3 





















1 



GASTlCmiPODA. 



Euconispira sp. a 





j 









' 





1 



Euconispira sp. b 

















1 











\' 











'> 



Loxonema plicatum 



















9 



Losonema ? peoriensc 







- 











9 









(?) 



















(?) 

 











X 







X 

 X 

 X 











Strophostylus remox 







X 

















9 











X 

 X 









X 







3 



Bellerophon crassus* 







X 

 ■ X 



X 











3 







X 































X 



X 









X 



4 









i 













"For a description of the localities indicated by number in this table, see loealitj' register, pp. 519-532. 

 * Species marked by an asterisk occur also in the Hermcsa formation. 



The fauna of the Molas formation known is very limited, and will be found rep- 

 resented in the lir.st of the final columns of Table XIII. Isolated from other facts 

 there might exist some doubt from the present faunal evidence whether the Molas 

 formation belonged in the Lower or in the Upper Carboniferous, though I think 

 that even so it would be jjlaced by most paleontologists in the higher series. Com- 



