'IS 



CAKHONIFKROUS FORMATIONS AND FAUNAS OF COIjOKADo. 



iit Porrv Park, ii ml in the Upper Carl yon if orous (i) congloiiiorate of Larimer County. 

 1 shall proceed lo speak separat(>ly of each local j^roup of faunas. 



SAN JUAN REGION. 



Collections were made in the Sau Juan region at nine localities (stations 2379, 

 23SO, 23S1. 2382. 2384, 2385, 2386, 2387, 2388), and contain 32 species. The material 

 was obtained, part of it in place (from the top of the Ouray limestone), part from 

 cherts and cherty limestones lying loose upon areas of Ouray outcrop, and part from 

 chert bowlders included in the unconformably overlying red shale of the Hermosa 

 formation. The fauna is in ever}^ case essentially the same. The local faunas of 

 this region represented in our collections are exhibited in the following table: 

 Table I.« — Table showing dinlrihaUon of Missmippian species in the Ouray limestone of the San Juan region. 





2379. 



2380. 



2381. 



2382. 



2384. 



2385. 



2386. 



2387. 



2388. 



Total. 



CCELENTERATA. 



X 

 X 

 X 









X 











2 



Zaphreutis? sp. a 





X 













2 



X 



X 





X 





X 



6 







X 



1 



ECHINODEKMATA. 







X 

 X 



X 

 ^ X 

 X 

 X 

 X 



X 

 X 













1 













X 

 X 









2 



BRYOZOA. 















2 

















1 















X 







2 



















1 



Fistulipora ? sp 



















1 



BEACHIOPODA. 



Khipldomella pulchella 



X 

 X 

 X 

 X 

 X 







X 

 X 



X 



X 









4 



Orthothetes ineequalis. 





X 

 X 









5 











2 

















1 



Productus semireticulatus var . 





X 



X 



X 











4 



Productus parviforrais . 











1 



Productus Isevicostus 



X 

 X 





X 

 X 

 X 

 X 













2 







X 



X 



(?) 











4 

 2 

 4 



2 



1 



1 



Spirifer peculiaris'' 











Spiriferinasolidirostris'. . 



X 





X 

 X 

 X 



X 









Seminula sp 















X 

 X 



X 













CamarotcEchJa metallica 

















PELECYPODA. 



Crenipecten hallanus 























X 







X 





X 





3 



Myalina keokuk 







X 



X 

 X 





1 



GASTEROPODA. 







X 





X 























1 



StraparoUus utahensis 







X 

 X 













1 

 1 



1 





















TRILOBITA. 



Phillipsia peroccidens 







X 













^ ^ 1 



\""" 













a For a description of the localities indicated by number in this table see locality register, pp. 519-53a. 



